We examine the generalizability of internally valid estimates of causal effects in a fixed population over time when that population is subject to aggregate shocks. This temporal external validity is shown to depend upon the distribution of the aggregate shocks and the interaction between these...

Organisation und Management zur verbesserten Wassernutzung in der Landwirtschaft des Sudan - eine empirische Studie Der Sudan, das größte Land Afrikas, kann stellvertretend gesehen werden für die Probleme, die den afrikanischen Kontinent bewegen. An erster Stelle ist die Ernährungssicherung...

The purpose of this study is to measure the sensitivity of trade volumes and unit values to agricultural productivity shocks at home and abroad. We find that the unit values of trade ows vary systematically with production shocks using both aggregate data on a large sample of countries and...

The Paper's goal is to assess the most important changes in the European Union's Common Agricultural Policy (CAP) for years 2014-2020 in the context of its potential influence on environmental pressure of agriculture. The final solutions of that policy reform were discussed in relation to main...

The persistent agrarian crisis facing sub-Saharan Africa (SSA) and the recent food price hikes have provoked greater urgency among governments, civil society actors and development agencies to identify public policies that can accelerate agricultural transformation towards achieving food...