In general, the regression results indicate that the area planted to rice in Thailand is more responsive to changes in lagged area planted, the amount of rainfall, and the availability of agricultural labor than to changes in paddy rice prices. Moreover, rice area planted is marginally more sensitive to current market price than to lagged paddy rice price. This result may be a consequence of the guaranteed rice price policy operated by the Thai government. Farmers likely use the announced guaranteed price as the expected selling price instead of lagged prices. The reported market paddy prices have generally been at the guaranteed price level so that the farm price of rice reported is a proxy for the announced support price in each year. The results also indicate that the area planted to rice adjusts relatively slowly from year to year which is consistent with the fact that Thai rice farmers face numerous infrastructure, technology, credit, and other constraints that affect annual rice production decisions.