The research was conducted by the Institute of Population Studies, Chulalongkorn University, to revise and update the information concerning populations of the countries in the Southeast Asian region of which data were collected in the form of population data base. The main purpose is to provide up-to-date data base that could be served as an advantageous and beneficial source of information for both scholars and businessmen. The study investigates the requirement of data for business planning and examines closely the scope of various kinds of businesses and regions where the business is done ranked according to areas of importance. It focuses on the various categories of data and sources of information required and used by businessmen is planning their work. The ideas and opinions of businessmen as to the usefulness of various sorts of data are taken into consideration. The businessmen were also asked to indicate the sorts of data they thought might be useful for them and should be put in the data base. The findings show that the scope of most of the business organizations in Thailand are both national and international. Thailand is the first target country in doing business. The countries is Indochina region rank second to Thailand. The major sources of information which are used by the businessmen in doing their businesses are derived from governmental organizations, persons working in business firms, and business agencies. The study reveals that the data which are useful in doing business are population density growth rate, number and percentage of population in urban and rural areas. The level of ever used of data among businessmen are relatively low compared with the level of considering the data to be useful. It is even clearly seen that the data are beneficial only for people in small number compared with the quantity and the usefulness of the data.
