摘要：The principles and evolution of intervention in agriculture are critically analyzed fromthe perspective of the economics and economic of agriculture theories. The allocation andreturns aspects of economics are used as references in the analysis. The assumptions andoutcomes of a triple factors production function, first aspect, are usually used asa justification for intervention support. That type of production function explains, as isbelieved, the lover possibilities of labor productivity growth in agriculture compared tonon- farm labor employment. That affects, as assumed, income disparities between farmand non-farm labor. The analysis also disputes the politically, institutionally andadministratively based justifications for the intervention. The evolution of interventionmeasures from price support towards direct payments and subsequently more market, aresubject of review as well.
