Research on (he agricultural economics in the 1970 s and 1980 s VILJO RYYNÄNEN The objective of this study is to examine the main lines of research on the agricultural economics in the 1970 s and 1980s. It is reasonable that the scope of this study also includes theoretical-methodological research and research concerning the solving of practical problems. The last-mentioned field is so extensive and has so many different levels that, in this work, it is possible to deal only with the key research topics still considered to be important. The purpose of the agricultural economics is to deal with the economic problems encountered by people working in agriculture, the most common of which are problems of choice and the criteria used to make choices. A characteristic feature of economics is the attempt to develop models which can be used to compare the relationship between the advantage (often also the disadvantage) resulting from man's actions and the sacrifice required by such actions. These comparisons also involve problems concerning values. Choices are followed by decision-making. As human actions have become more complex,