In this study the sugar beet supply function in Karaj area was estimated. Dummy variables were used to seperate the length of the study (1973-1990) into two periods of 1975—1981 and 1981—1990, since it was thought that due to the Islamic revolution and Iraq-Iran war the economic environments were totally different, from each other in these periods.
The results of the study indicated that the most important tactor attecting the supply of sugar beet was its price level. However, due to population growth and immigration to the study area, other products have become competitive with sugar beet and consequently the elasticity of sugar beet supply has become considerabley inelastic.
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