sentences:  TDRI was established by the initiative of the National Economic and Social Development Board as a public policy research institute in 1984 that want to have a research agency and propose a policy to be independent of political power and civil servants for this reason, General Prem Tinsulanonda, Thai Prime Minister at that time and Pierre Trudeau, Prime Minister of Canada therefore signed an agreement to provide assistance for granting funds to establish the institution at the beginning through the Canadian International Development Agency, in addition, the United States Agency for International Development also provides funding for the establishment like other private companies such as Mitsui Group or Unocal Corporation.Its legal form is that of a private non-profit foundation.It provides technical analysis (mostly, but not entirely, in economic areas) to various public agencies to help formulate policies to support long-term economic and social development in Thailand.