https://www.capri-model.org/dokuwiki_help/ 2026-04-08T08:47:09+00:00 https://www.capri-model.org/dokuwiki_help/ https://www.capri-model.org/dokuwiki_help/lib/tpl/dokuwiki/images/favicon.ico text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=annex_code_lists&rev=1667816629&do=diff Annex: Code lists Table 1: Codes used for storing the original REGIO tables in the data base and their description, rows Codes used in CAPRI’s REGIO tablesOriginal REGIO descriptionTOTLTerritorial areaFOREForest landAGRIUtilized agricultural areaGARD text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=baseline_generation&rev=1667816629&do=diff Baseline Generation On forecasts in simulation models The purpose of a baseline is to serve as a comparison point or comparison time series for counterfactual analysis. The baseline is interpreted as a projection in time covering the most probable future development of the European agricultural sector under the status-quo policy and including all future changes already foreseen in the current legislation.\begin{equation} X_{r,i,t}^{j,Trend}=a_{r,i,j}+b_{r,i,j}t^{c_{r,i,j}} \end{equation}\(t_{1… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=baseline_reproduction_run&rev=1667816629&do=diff Baseline reproduction run Not formally a component of the baseline calibration procedure, it has become an established habit to validate the calibration of supply using the simulation models themselves. There are many conceivable circumstances where the build-in calibration tests would pass, but a normal simulation nevertheless would not replicate the calibration point, for instance if some necessary and calibrated data is not properly loaded. Furthermore, the calibration does not produce the f… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=build_databases_and_baselines&rev=1667816629&do=diff Build databases and baselines The stable releases are shipped with only input data, but not with any of the consistent model databases needed to run the model. Those are created by tasks executable from the GUI. So, now you need to build all databases of CAPRI. This takes very long time. Depending on the hardware you use, it can take up to several days. In order to keep track of all the various settings required for executing the model, the release contains a “batch execution file” that instruc… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=calibrating_the_global_trade_model&rev=1667816629&do=diff Calibrating the global trade model After the Task on Trends generation have been successfully completed, meaning that the projections for the defined (in GUI or a batch file) future years (currently, 2015, 2020, 2025 and 2030 are available) have been produced, the next step in the Baseline generation process (\begin{equation} SSQ\cdot \sum_{RMS} \sum_{XXX} p\_weight_{RMS}^i=\sum_{RMS} \sum_{XXX} \left( \frac{v_{RMS,XXX}^i-DATA_{RSM,XXX,BAS}^i}{max(DATA_{RSM,XXX,BAS}^i,0.1) \cdot p\_weight_{RMS}… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=calibrating_the_supply_models_to_the_captrd_projection&rev=1667816629&do=diff Calibrating the supply models to the CAPTRD projection Introduction The supply side models of the CAPRI simulation tool are programming models with an objective function. If we want the optimal solution to coincide with the forecast procuced by the projection tools of CAPTRD, we need to ensure that first and second order optimality conditions (marginal revenues equal to marginal costs, all constraints feasible, and the solution is a maximum point) hold in the calibration point for each of the … text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=capdis_module_gui_basics&rev=1667816629&do=diff CAPDIS module – GUI basics Files: %curdir%/capdis.gms %curdir%/capdis/capddis_relevantsets.gms The distribution of crop shares, livestock numbers, yield and nitrogen flows is a sequential process of a number of sequential steps (CAPRI tasks). The distribution of land use and livestock numbers, yield and irrigation shares in each step is based on the results of the previous step which is used as priors. text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=capri_development_and_applications&rev=1667816629&do=diff CAPRI development and applications CAPRI – ‘Common Agricultural Policy Regionalised Impact analysis’ is both the acronym for an EU-wide quantitative agricultural sector modelling system and of the first project centred around it. The scope of the project has widened over time: the first phase (FAIR3-CT96-1849: CAPRI 1997-1999) provided the concept of the data base and the regional supply models, but linked these to a simple market model distinguishing the EU and rest-of-the-world. In parallel, … text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=capri_uses_the_gams_software&rev=1667816629&do=diff CAPRI uses the GAMS software To solve the large-scale, non-linear optimization problems in the model, CAPRI uses a software called GAMS (General Algebraic Modelling System). GAMS is a programming language designed for solving optimization problems, widely used in economic modelling. Models in GAMS are defined by one or several text files (gms files) that contain definitions and solution methods for solving constrained optimization problems (such as the supply models of CAPRI) or systems of equa… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=code_style&rev=1667816629&do=diff Table 2: Main elements of the CAPRI data base <Code:javascipt linenums:0 |Example #1 Our gams code: hello.php> p_trqBilat(RM,“LDC”,XX,“TrqNT”,“%SIMY%”) $ (DATA(RM,“TARS”,XX,“%SIMY%”) or DATA(RM,“TARV”,XX,“%SIMY%”)) = 1.E+10; p_trqBilat(RM, text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=data_distribution_procedures&rev=1667816629&do=diff Data Distribution Procedures The terms spatial “resampling”, “re-mapping, “downscaling”, “disaggregation” and “distribution” are frequently used in a synonymous way. Admittedly, a very sharp distinction is sometimes difficult and there are overlaps in their meaning, this holds especially for “downscaling” and “disaggregation”. To avoid confusion of the reader we lay down our interpretation of these terms.\begin{equation} if \; 0 \lt a_{ij} \le 1 \; for\; i\in I \;and\; j\in J \; then\; a_{ik}=0… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=decomposition_of_changes_in_aggregates_yields_and_activity_related_income_indicators&rev=1667816629&do=diff Decomposition of changes in aggregates yields and activity related income indicators The idea behind the decomposition is to analyze which factors drive the change in yields and income indicators using growth rates. Take for example the market income of cereals per ha at EU level. Its change in a simulation against the baseline depends on the change in prices and the change in yields. The change in yields in turns depends on the effect of the yield elasticity, the change in the shares of low an… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=disaggregation_of_crop_areas&rev=1667816629&do=diff Disaggregation of crop Areas Files: %curdir%/capdis/disyield.gms %curdir%/capdis/disyield_sets.gms %curdir%/capdis/m_hpdCropSpat.gms %datdir%/capdishsu/pesetagrid_fractionfsu.gdx %datdir%/capdishsu/irriShare2000fsu.gdx The principle of the distribution of crop areas is based on few constraints only: full exhaustion of available ares for each spatial unit, vertical consistency, and primacy of land stability. \begin{equation} A_{c^*,r}=\sum_h\{a_{c^*,h}\} \end{equation}\(a_{c^*,h}\)\(A_{c^*… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=disaggregation_of_nitrogen_input&rev=1667816629&do=diff Disaggregation of Nitrogen Input Nitrogen input to fields needs to be distributed over the spatial units in a region where the crop is cultivated. For each crop, the regional nitrogen balance is given with total N inputs per N input type, an N outputs or losses per output and loss type.\begin{align} \begin{split} &\text{Crop growth model (Godard et al., 2008)} \\ &Y_{r,c} = Y_{r,c}^{mx}-(Y_{r,c}^{mx}-Y_{r,c}^{mn}) \cdot exp\{-f^{cropcurve}\cdot Q_{r,c}\} \end{split} \end{align}\begin{align} \be… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=disaggregation_of_yield_and_irrigation&rev=1667816629&do=diff Disaggregation of yield and irrigation Files: %curdir%/capdis/disyield.gms %curdir%/capdis/disyield_sets.gms %curdir%/capdis/m_hpdYieldIrri_init.gms %curdir%/capdis/m_hpdYieldIrri.gms %datdir%/capdishsu/pesetagrid_fractionfsu.gdx %datdir%/capdishsu/irriShare2000fsu.gdx \begin{equation} y_{h,c}=y_{h,c}^{wly}+f_{h,c}^{irri}\cdot (y_{h,c}^{py}-y_{h,c}^{wly}) \quad \forall h,c \end{equation}\(y_{h,c}\)\(f_{h,c}^{irri}\)\(y_{h,c}^{wly}\)\(f_{h,c}^{irri}\)\(y_{h,c}^{py}\)\begin{equation} y_{h,c}^{wly… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=downscaling_of_livestock_numbers&rev=1667816629&do=diff Downscaling of Livestock numbers Files: %curdir%/capdis/dislivestock.gms %datdir%/capdishsu/corine2018classes.gms %datdir%/capdishsu/s_fracGraz.gms %datdir%/capdishsu/p_fracGraz.csv %datdir%/capdishsu/p_grazsharesCorine.gms %datdir%/capdishsu/p_fsuCorineArea.gdx \(v_{lgr}\)\begin{equation} ν_{lgr,h}= N_{l,r} \cdot χ_{graz,lgr,r}\cdot A_{lcl,lgr,r} \end{equation}\begin{equation} n_{lgr,h}= ν_{lgr,h} \cdot a_{lcl,lgr,h} \end{equation}\(ν_{lgr,h}\)\(N_{l,r}\)\(n_{lgr,h}\)\(χ_{graz,lgr,r}\)\(A_{l… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=dual_analysis&rev=1667816629&do=diff Dual analysis (T. Jansson) Constrained optimisation background The supply model in CAPRI is a constrained optimization problem, maximizing profits plus a nonlinear term subject to multiple constraints. In some simulations, production activities in the model are affected in several ways simultaneously, and it is difficult to understand what the key drivers are behind a specific change. There may be changes both in parameters of the model such as prices or subsidies and also of dual values of re… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=energy_use_in_agriculture&rev=1667816629&do=diff Energy Use in Agriculture FIXME Introduction and basics The objective of the CAPRI energy indicator is to improve the existing CAPRI model in its capabilities to display environmental effects of agricultural production activities. In order to give a short overview of the structure of the energy indicator, the underlying methodology of Life Cycle Analysis will be introduced covering structure of the energy coefficients used for assessment. In a second part, the assessment methodology of the s… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=farm_structure_units_fsu&rev=1667816629&do=diff Farm Structure Units – FSU Files: %datdir%/capdishsu/s_fsu_srnuts2.gdx %datdir%/capdishsu/fsunogo.gms %datdir%/capdishsu/m_grid10n2.gms %datdir%/capdishsu/p_fsu_grid10n2.gdx %datdir%/capdishsu/p_fsu_srnuts2.gdx %datdir%/capdishsu/p_fsu_area.gdx %datdir%/capdishsu/p_fss2010.gdx text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=forecast_tool_captrd&rev=1667816629&do=diff Forecast tool CAPTRD The tool providing projections for the European regions (the EU as of 2019, Turkey, Norway, Albania, Northern Macedonia, Montenegro, Bosnia and Herzegovina, Kosovo and Serbia) in CAPRI is called CAPTRD. It operates in several steps:\begin{equation} X_{r,i,t}^{j,Trend}=a_{r,i,j}+b_{r,i,j}t^{c_{r,i,j}} \end{equation}\(t_{1984} = 0.1, t_{1985} = 0.2, t_{1986} = 0.3 \)\begin{equation} wSSE_{r,i,j}=\sum_{expost} \left(X_{r,i,expost}^{j,"Data"}-a_{r,i,j}+b_{r,i,j}t_{expost}^{c_{r… text/html 2025-04-22T14:13:15+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=getting_started_with_capri&rev=1745331195&do=diff Getting started with CAPRI Installing CAPRI Stable Release 2 and earlier CAPRI Stable Release (STAR) 2 and earlier releases are published with a full set of data, i.e. including all the intermediate data required to build the complete database and produce a calibrated baseline. The model with raw data and the consolidated model database are shipped in two compressed archives. For the latest release, STAR 2.8, they are called text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=how_to_edit_this_wiki&rev=1667816629&do=diff How to Edit Capri Wiki Each chapter has an edit button (right of the text), which allows for the editing of the whole chapter. This button will only be visible to authors. At the end of each section is another edit button which will only open the specific section. To create a new chapter navigate to the sidebar. Open any chapter select Backlinks (under edit) choose sidebar. Here, create a new chapter by editing the side bar and wirting [ [ Chaptername ] ]. Save the edit, click on the newly cre… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=how_to_get_it&rev=1667816629&do=diff How to get it From 2016, the CAPRI model was made more accessible to the scientific community by the provision of supported stable releases. The stable releases are tagged and “frozen” versions of the model that can be referenced to and that will not ever change. Clearly, there is no such thing as bug-free software. Nevetheless, the release versions have been subjected to extensive testing, ensuring that all supported features technically work, and where many known issues are documented. text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=input_allocation_for_labour&rev=1667816629&do=diff The global database components text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=input_allocation&rev=1667816629&do=diff Input Allocation The term input allocation describes how aggregate input demand (e.g. total anorganic N fertiliser use in Denmark) is ‘distributed’ to production activities. The resulting activity specific data are called input coefficients. They may either be measured in value (€/ha) or physical terms (kg/ha). The CAPRI data base uses physical terms and, where not available, input coefficient measured in constant prices.\begin{equation} \sum_{r,fint}\overline{FEDUSE}_{r,fint}PFOD_{r,fint} = \o… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=installation_instructions&rev=1667816629&do=diff Installation instructions Using CAPRI requires extensive knowledge of how the system works. Please look out for CAPRI training courses on the page of upcoming events. The following bare-bone instructions may nevertheless be sufficient to get the system up and technically running. text/html 2024-06-27T16:54:40+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=introduction&rev=1719507280&do=diff Introduction Structure of the documentation The documentation is structured as follows. Sections What is CAPRI-CAPRI uses the GAMS software give an overview of CAPRI system and its main software, GAMS. Section 1.4 informs about the CAPRI network. Sections 1.5 and 1.6 describe historical development of the model and more recent examples of CAPRI studies. Chapter text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=linking_the_different_modules_the_price_mechanism&rev=1667816629&do=diff Linking the different modules – the price mechanism Iterative solution method As hinted at above several times, the market modules and the regional programming models interact with each other in an iterative way. Basically, the market modules deliver prices to the supply module, and the supply module information to update the supply and feed demand response from the market models. text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=market_module_for_agricultural_outputs&rev=1667816629&do=diff Market module for agricultural outputs Overview on the market model Whereas the outlay of the supply module has not changed fundamentally since the CAPRI project ended in 1999, the market module was completely revised. Even if several independent simulation systems for agricultural world markets are available as OECD’s AgLink, the FAPRI system at the University of Missouri or the WATSIM\begin{equation} v\_prodQuant_{i,r} = as_{i,r}+ \sum_j bs_{i,j,r} \frac{v\_prodPrice_{j,r}}{p_{index,r}} \end… text/html 2023-09-08T12:11:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=module_for_agricultural_supply_at_regional_level&rev=1694175068&do=diff Module for agricultural supply at regional level Basic interactions between activities in the supply model There are two sources for interactions between activities in simulation experiments: the objective function and constraints. In the current version of CAPRI, the objective function does solve inter-activity terms for groups of arable crops, so that the major interplay is due to constraints. The interaction is best understood by looking at the first order conditions of a programming model … text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=more&rev=1667816629&do=diff $a^2=a^3+b^3$ text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=on_forecasts_in_simulation_models&rev=1667816629&do=diff On forecasts in simulation models The purpose of a baseline is to serve as a comparison point or comparison time series for counterfactual analysis. The baseline is interpreted as a projection in time covering the most probable future development of the European agricultural sector under the status-quo policy and including all future changes already foreseen in the current legislation. text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=overview_of_capri_baseline_processes&rev=1667816629&do=diff Overview of CAPRI baseline processes The creation of a baseline in CAPRI is considered a “workstep” in the GUI, and it consists of three distinct tasks. In addition to those three tasks, the modeller will usually want to perform a simulation of “no change” to reproduce the calibrated baseline with the model. Figure below illustrates the principal data flows involved in the baseline process. Each step is further described in a separate section of this chapter. text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=overview_of_the_system&rev=1667816629&do=diff Overview of the system The CAPRI simulation tool is composed of a supply and market modules, interlinked with each other. In the supply module, regional or farm type agricultural supply of crops and animal outputs is modelled by an aggregated profit function approach under a limited number of constraints: the land supply curve, policy restrictions such as sales quotas and set aside obligations and feeding restrictions based on requirement functions. The underlying methodology assumes a text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=policy_data&rev=1667816629&do=diff Policy data Policy data linked to European and international markets Data on trade policies on the global agri-food markets first appear in the global database of CAPRI. More specifically, the original tariff data are aggregated to the commodity definitions of CAPRI in the tariff aggregation module. The tariff aggregation procedures in CAPRI require data not only on the tariffs themselves but also on traded quantities and import prices. two tariff/trade databases are supported currently: text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=post_model_analysis&rev=1667816629&do=diff Post model analysis Dual analysis T. Jansson Constrained optimisation background The supply model in CAPRI is a constrained optimization problem, maximizing profits plus a nonlinear term subject to multiple constraints. In some simulations, production activities in the model are affected in several ways simultaneously, and it is difficult to understand what the key drivers are behind a specific change. There may be changes both in parameters of the model such as prices or subsidies and also … text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=post_model_sensitivity_analysis_with_features_in_the_supply_model&rev=1667816629&do=diff Post model sensitivity analysis with features in the supply model The behaviour of the CAPRI supply model depends on the interaction between endogenous variables such as production and feeding activities both via the objective function and the constraints. Even if the dual analysis of the results may help, understanding the changes in levels of endogenous variables compared to the baseline is far from trivial. As the directions and size of certain impacts on the reported changes is not known, r… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=premium_module&rev=1667816629&do=diff Premium module Overview For the European Union, the CAPRI programming models cover in rich detail the different coupled and de-coupled subsidies of the so-called first Pillar 1 of the CAP, as well as major ones from Pillar 2 (i.e., Less Favoured Area support, agri-environmental measures, Natura 2000 support). The interaction between premium entitlements and eligible hectares for the Single Farm Payment (SFP) of the CAP is explicitly considered, as are the different national SFP implementations… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=production_activities_as_the_core&rev=1667816629&do=diff Production Activities as the core Authorship:Peter Witzke The economic activities in the agricultural sector are broken down conceptually into ‘production activities’ (e.g. cropping a hectare of wheat or fattening a pig). These activities are characterised by physical output and input coefficients. For most activities, total production quantities can be found in statistics and output coefficients derived by division of activity levels (e.g. ‘soft wheat’ would produce ‘soft wheat’ and ‘straw’, … text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=references&rev=1667816629&do=diff References Adenaeuer, M.; Louhichi, K.; de Frahan, B.H., Witzke, H.P. (2004). Impacts of the ‘Everything but Arms’ initiative on the EU sugar sub-sector. Selected paper prepared for presentation at the International Conference on Policy Modelling (EcoMod2004), June 30 - July 2, Paris text/html 2023-09-08T12:07:16+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=scenario_simulation&rev=1694174836&do=diff Scenario simulation Overview of the system The CAPRI simulation tool is composed of a supply and market modules, interlinked with each other. In the supply module, regional or farm type agricultural supply of crops and animal outputs is modelled by an aggregated profit function approach under a limited number of constraints: the land supply curve, policy restrictions such as sales quotas and set aside obligations and feeding restrictions based on requirement functions. The underlying methodol… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=sensitivity_analysis&rev=1667816629&do=diff Sensitivity analysis The CAPRI model results depend on a large number of parameters, some of which are more uncertain than others. In order to analyze how model results depend on uncertain parameters, a set of sensitivity analyses were carried out in the context of an analysis of the climate impact of EU coupled support text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=sidebar&rev=1667816629&do=diff Introduction * Structure of the documentation * What is CAPRI * CAPRI uses the GAMS software * The network * CAPRI development and applications Getting started with CAPRI * Installation instructions * Download * System requirements * Build databases and baselines * Release notes * Trunk Result Folder The CAPRI Data Base * Production Activities as the core * The Complete and Consistent Data Base (COCO) for the national scale * The Regionalised Data Base (CAPREG) … text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=solving_the_market_model&rev=1667816629&do=diff Solving the market model The solution of the market model with its close to 750.000 equations of which some are highly non-linear poses a serious challenge for any non-linear solver. CAPRI applies CONOPT which has proven quite stable and fast to solve both constrained system and optimization problems. However, even CONOPT would spend quite some time when trying to solve the full market model in one block after a larger shock is introduced. text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=spatial_dis-aggregation_capdis_module&rev=1667816629&do=diff Spatial dis-aggregation CAPDIS module Introduction Environmental impact assessment of farm management decisions is often only possible in a spatial context, taking local conditions as land cover, climatic and soil conditions into account. Equally, farm management decisions depend to a larger extent on those local factors. Therefore, a CAPRI module has been developed that allows monitoring and ex-ante assessment of environmental impacts of agriculture at a \begin{equation} A_{c^*,r}=\sum_h\{a_{… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=stability_testing_tools_for_model_tasks&rev=1667816629&do=diff Stability testing tools for model tasks During the Stable Release project, tasks were added to the CAPRI system that are aiding in testing the coherence and stability of the entire system. Those tasks are accessible from the GUI in the work step “Tests”. Those tasks help developers running the model with different settings or with different starting values and systematically comparing the results. text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=start&rev=1667816629&do=diff Introduction Structure of the documentation The documentation is structured as follows. Sections What is CAPRI-CAPRI uses the GAMS software give an overview of CAPRI system and its main software, GAMS. Section 1.4 informs about the CAPRI network. Sections 1.5 and 1.6 describe historical development of the model and more recent examples of CAPRI studies. Chapter text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=structuretest&rev=1667816629&do=diff Structuretest Content section1 No content section2 \begin{equation} 1+1=2 \end{equation} Equation with lower than \begin{equation} 1+1 \lt < 4 \end{equation} text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=system_requirements&rev=1667816629&do=diff System requirements CAPRI requires that you have a windows computer with Java runtime environment (64-bit) and GAMS (<http://www.gams.com> distribution 24.7 or later is recommended) installed. You need a license for the CONOPT solver. Many tasks in CAPRI utilize parallel computing. It is therefore an advantage if you have a machine that can run many threads in parallel. text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=test&rev=1667816629&do=diff Table 2: Main elements of the CAPRI data base Activities Farm- and market balances Prices Positionsform from the EAA Outputs Output coefficients Production, seed and feed use, other internal use, losses, stock changes, exports and imports, human consumption, processing text/html 2026-03-31T08:58:11+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=the_capri_data_base&rev=1774947491&do=diff The CAPRI Data Base Models and data are almost not separable. Methodological concepts can only be put to work if the necessary data are available. Equally, results obtained with a model mirror the quality of the underlying data. The CAPRI modelling team consequently invested considerable resources to build up a data base suitable for the purposes of the project. From the beginning, the idea was to create wherever possible sustainable links to well-established statistical data and to develop alg… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=the_complete_and_consistent_data_base_coco_for_the_national_scale&rev=1667816629&do=diff The Complete and Consistent Data Base (COCO) for the national scale The COCO database is built by the application of two modules: COCO1 module: Prepare national database for all EU27 Member States the Western Balkan Countries, Turkey and Norway.\(DATA(GROF,t) = p\_agriProd(USAP,t+1)\)\(DATA(GROF,t) = p\_agriProd(GROF,t)\)\begin{align} \begin{split} min_{y_{i,t}} &\sum_{i,t\in obs} wgt^{dat}((y_{i,t}-y_{i,t}^{dat})/abs(y_{i,t}^{trd}-y_{i,t}^{dat}))^2\\ & + \sum_{i,t\notin obs} wgt^{ini}((y_… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=the_global_database_components&rev=1667816629&do=diff The global database components Task: Prepare FAOSTAT database This task prepares and partially combines FAO data originally contained in separate tables from the FAOstat webpage to finally store them in gdx files for further use. This refers to: Commodity balances, production and landuse statistics (all stored in faodata.gdx), special balances for dairy products (fao_milkdata.gdx), population (fao_population.gdx), as well as the bilateral trade matirix (fao_trade_for_global.gdx). text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=the_network&rev=1667816629&do=diff The network Methodological development, updating, maintenance and application of CAPRI are based on a network approach, in the first 15 years certainly dominated by the key developer Wolfgang Britz and a series of PhD projects supervised by Thomas Heckelei. In the meantime responsabilites have spread with main contributors in recent years being the Bonn team (U Bonn, EuroCARE), Thünen, SLU, JRC-Sevilla and JRC –Ispra. Over the years researchers from various universities and institutes (from Nor… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=the_regionalised_data_base_capreg&rev=1667816629&do=diff The Regionalised Data Base (CAPREG) Data requirements and sources at the regional level CAPRI aims at building up a Policy Information System of the EU’s agricultural sector, regionalised at NUTS 2 level or farm types inside NUTS 2 regions with an emphasis on the impact of the CAP. The core of the system consists of a regionalized or farm type agricultural sector model using an activity based non-linear programming approach. One feature of such a highly disaggregated, activity based agricultur… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=welfare_analysis&rev=1667816629&do=diff Welfare analysis A key element in analysing policy changes from an economic viewpoint is to look at welfare changes. The “classical” elements of a welfare analysis are changes in consumer and producer rents and for the tax payer. That concept is also followed in CAPRI.\begin{equation} M(cpri^r,cpri^s,Y^r )=e(cpri^r,U(cpri^s,Y^r )) \end{equation}\(Y^r\)\(cpri^r (cpri^s)\)\begin{align} \begin{split} e (cpri^r, U(cpri^s,Y^r)) &= \left\{ F^r+ \frac{G^r}{G^s⁄(Y^r-F^s)}-Y^r \right\}+Y^r \\ & = \left… text/html 2022-11-07T10:23:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.capri-model.org/dokuwiki_help/doku.php?id=what_is_capri&rev=1667816629&do=diff What is CAPRI The Common Agricultural Policy Regional Impact (CAPRI) model is a global partial equilibrium model for the agricultural sector, with a focus on the European Union. It has been designed for ex-ante impact assessment of agricultural, environmental and trade policies. It has a supply module covering the EU and some auxiliary European countries