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Item Restricted Impact of climate change on Philippine rice production(2007-10) Archita, AraThe issue of climate change has been in the center of the global arena for the last decades. Agriculture, where temperature is a significant determinant, becomes vulnerable if permanent changes in climate patterns take place. As such, this paper attempts to quantify the impact of climate change in Philippine agriculture using a time series data from 1980- 2002 of palay from the top producing rice regions of Cagayan Valley, Central Luzon, Bicol and Western Visayas through the widely used method of production function. The estimation uses production output as means to measure the impact brought about by climate changes. Through the use of the production function approach, the volume of rice output is regressed against climate variables and other inputs of production. Results show that the changes seen in climate patterns over the last two decades have augmented rice production for both irrigated and non-irrigated farmlands. However, the marginal increase in output decreases as temperature continuous to warm up. Moreover, the effects of rainfall differ from irrigated and non-irrigated farmlands. Results show that precipitation is a significant factor in determining the volume of rice production only in non-irrigated farmlands during the first semester. In addition, results show that soil quality and socio-economic variable plays a significant role in rice production. As such, government policies should be geared towards proper mitigation to address the consequences of increasing temperature brings to rice production.