An increasing population in recent decades has led to the need for increasing the availability of food, so it is necessary to increase the production of paddy as quickly as possible. The aim of this research was to know the supply response of paddy in East Java to various price factors and non-price factors. In this research, the supply response was estimated by the paddy harvest areas in East Java using Cobb-Douglas model and Nerlove partial adjustment, and econometric analysis including stationarity test, cointegration test, and Error Correction Model (ECM). The data used in this research consisted of paddy harvest areas, grain price, corn price, irrigated land area and rainfall amount from 1991 to 2015. The speed of short-term adjustment to the longterm supply of rice was 2.79% and was corrected in the next period. In the short run, all variables did not have a high responsiveness to paddy supply, but in the long run, the irrigation area was very responsive to paddy supply in East Java with a value of elasticity of 1.79. Supply of paddy can be increased by increasing the real price of unhulled rice, the irrigated land, and harvested area of the previous period.

No abstract

Rice production is greatly affected by climatic factors, while those factors keep changing along with time. Therefore, the effects of climate change toward rice production in Indonesia need to be studied. The objective of this study is to: (1) determine the difference of interregional climate in each region and (2) determine the impact of climatic factors on rice production in Indonesia. Just and Pope Production function was used as the analytical frameworks, and Cobb-Douglas function form was used to analyze the data. The analysis was conducted towards rice production in ten provinces in Indonesia from 1985 to 2017. The result shows that there are some differences in climatic condition in each region in Indonesia. The regression analysis shows that maximum temperature and minimum temperature have positive impacts on rice production, meanwhile, El Nino and La Nina impact negatively. The results of this study can be considered by the policy makers in making decisions related to adaptation and mitigation to encounter climate change.

No abstract

In the last few decades, the implementation of tariff policies between countries has declined. As a result, the enforcement of non-tariff measures (NTMs) experiences an increase. Implementing NTMs raises a new obstacle to trade activities in the global market, including the trade of Indonesia’s natural rubber. Therefore, this study was conducted to determine the effect of enforcing NTMs on the export competitiveness of Indonesia’s natural rubber. This study utilized secondary data from UN COMTRADE on 1995 to 2019. The data was analyzed using frequency index, coverage ratio, comparative advantage, and two-stage least square regression model. The results revealed that India, China, and the USA enforced the most NTMs of Indonesia’s natural rubber. Additionally, the implementation of NTMs in importing countries positively correlated to the export competitiveness of Indonesia’s natural rubber in destination countries.