1) The document discusses a study examining the economic and social effects of protected areas and conservation policies in Costa Rica. 2) The study uses data on protected areas across Costa Rica and socioeconomic data from censuses and household surveys to analyze how parks and conservation policies may affect local welfare, wages, migration, and income diversification. 3) The identification strategy involves using matching methods to compare socioeconomic characteristics of households close to national parks versus those further away, both before and after the establishment of parks, to determine the causal impact.