Factors affecting toward Number of Automobile Sales in Thailand

Abstract

The objectives of this research were to study the factors affecting the number of automobile sales in Thailand and build the most suitable model. As the method of stepwise multiple linear regression analysis, the designated  dependent variables were the number of automobile sales in Thailand, which were divided into types of sedan, pickup truck, van and bus and truck. And the independent variables for this study were unemployment rate (X₁), rubber price (X₂), gross domestic product (X₃), commercial bank loan rates (X₄), number of population (X₅), average of diesel price (X₆) and average of benzene price (X₇). For secondary data, there were totally 43 quarters as of the first quarter in 2005 throughout the third quarter in 2015.

The results of research found that factors affecting the number of automobile sales in Thailand were different in types of automobile as follows; 1) The factors affecting  the number of sedan sales in Thailand were average of diesel price and gross domestic product (GDP), and the model for sedan was = -121,694.987 + 2,542.079X₆ + 0.607X₃ 2). The factors affecting  the number of pick-up truck sales in Thailand were rubber price and unemployment rate, and the model for pick-up truck was= 4,167.744 + 28.953X₂ - 1,453.562X₁ 3) The factor affecting the number of van and bus sales in Thailand was unemployment rate, and the model for van and bus was = 143,490 – 33,123.018X₁  and 4) The factor affecting  the number of truck sales in Thailand was gross domestic product (GDP), and the model for truck was = -2,512.65 + 0.044X₃