Model library

As discussed in Laborde, Martin, and van der Mensbrugghe (2011), using an optimal tariff aggregator to perform trade policy simulations is critical to improving quantitative assessments of trade reform. Nevertheless, providing such inputs for general and partial equilibrium models can be cumbersome since it requires combining large datasets (several millions of trade flows and tariffs for…

The spatial equilibrium model is a multi-region partial equilibrium model which links producers and consumers from different locations. It allows economists to examine the global economic and trade consequences of diverse trade policies by determining their effects on market, trade and welfare variables. As an example, it evaluates the impact of such policies on supply and demand, producer…

This model allows members to explore the sensitivity of computable general equilibrium (CGE) models to the choice of macroeconomic closure rules using the case of the standard IFPRI model for Nigeria and Tanzania. Two sets of simulations are performed: a 50 percent decrease in import taxes and a 10 percent increase in agricultural productivity. For each simulated scenario, we study around…

Development of agricultural value chains is necessary to help smallholder farmers in Africa. Domestic agricultural policies and trade policies impact all economic agents along the value chain, from farmers to traders to consumers. Thus, it is critical to understand the impact of policy distortions to agricultural incentives along the complete value chain. This AGRODEP Incentives along…

This Toolbox provides for methods for updating and balancing Social Accounting Matrices (SAMs) using Rwanda SAMs from 2006 and 2011 as an example. The objective is to update the initial SAM (2006) using four separate methods and compare each updated SAM with the final or observed SAM (2011). The four methods explored here are Cross-Entropy, Ordinary Least Squares, Huber, and Hellinger…