The structure of the package apt and the implementation of models for asymmetric price transmission (APT) are explained in this note. This type of economic analysis is typically time series analysis with the steps of unit root test, cointegration test, and finally error correction model. APT studies have evolved with several distinct stages: pre-cointegration, linear cointegration, nonlinear th...

The paper examines the effectiveness of the price stabilization mechanism for the broiler and poultry industry in Taiwan during the period 1999 to 2008. After presenting some background information on the domestic marketing system and price stabilization mechanisms for the broiler and pork industry in Taiwan, the paper discusses the smooth transition autoregressive (STAR) methodology. Monthly h...

The theory of demand and supply implies a positive relationship, or ‘‘price transmission’’ between the prices of products at different stages of manufacturing. This relationship was investigated with quarterly prices of softwood stumpage in the US South, and national prices of forest products, from 1977 to 2002. All prices, net of inflation, were found to be nonstationary and there was no evide...

How does an increase in food prices at the border impact poverty in Uganda given the strong spatial heterogeneity of the country and its limited domestic transportation and communication networks? Recently, a number of studies on the impact of international food prices on poverty in developing countries have been published. However, the role of spatial price transmission in this context remains...