Lanik aipagarrienak: Linear programming and economic analysis (1958); Capital theory and the rate of return (1963); Sources of unemployement in the United States (1964); Price expectations and the behavior of the price level (1970); Growth theory: an exposition (1970). Mundu osoan ezagunak dira, bestalde, teoria ekonomiko matematikoaz, kapitalaren eta hazkundearen teoriaz, makroekonomiaz eta baliabide naturalen ekonomiaz egindako lanak.