Trade policy impacts under alternative land market regimes in rural China

In this paper we apply a simulation model of a village economy in Guizhou province, China, to assess impacts of trade reform at the household and the village level under alternative land market regimes. Putting special emphasis on the modeling of household migration a trade reform scenario is simulated with and without the existence of a land rental market in the village.Significant impacts of the land market on the policy outcome regarding household production, income and welfare are found. The possibility to trade land within the village leads to increasing specialization into agriculture and migration among the households as a response to the policy shock. In a situation with a land market, incomes of households which expand agricultural production are less negatively affected by trade reform than incomes of households which migration more.At the village level, a land market does not influence the poverty outcome of the reform but reduces its inequality enhancing impact. Village migration and exports of agricultural outputs increase.     

A Dynamic Investment Model with Control on the Portfolio's Worst Case Outcome

This paper considers a portfolio problem with control on downside losses. Incorporating the worst-case portfolio outcome in the objective function, the optimal policy is equivalent to the hedging portfolio of a European option on a dynamic mutual fund that can be replicated by market primary assets. Applying the Black-Scholes formula, a closed-form solution is obtained when the utility function is HARA and asset prices follow a multivariate geometric Brownian motion. The analysis provides a useful method of converting an investment problem to an option pricing model.     

EC Agricultural reform ad infinitum?

After protracted negotiations, the EC Ministers of Agriculture agreed on a reform of the Common Agricultural Policy on July 1st. Will this reform solve the fundamental problems plaguing the common agricultural market? Is it compatible with the GATT?     

On the uniqueness of the solution to a large linear assignment problem

The core of a linear assignment problem contains a continuum of allocations. A model is presented where this core shrinks to a unique solution of the limit problem as the number of agents grows.