This paper attempts to measure and analyze the interdependent economic relations between the countries of Thailand and Vietnam, made possible by constructing a bilateral inputoutput (I-O) table linking the said two countries. It is an inter-regional type of I-O models that provides a compact and comprehensive accounting framework to quantify the economic interrelationships among and between industries located in the study regions. Similar to a single-region (national) IO table, an Inter-Regional IO (IRIO) table can be used to estimate the magnitude of an external “shock” on major macroeconomic indicators such as output, value-added, income and employment