Columbia subject headings:
Balance of trade--United States--Econometric models--Congresses.
United States--Commerce--Econometric models--Congresses.
Harvard subject headings:
Balance of trade--United States--Econometric models--Congresses.
United States--Commerce--Econometric models--Congresses.
Princeton subject headings:
Balance of trade--United States--Econometric models--Congresses.
United States--Commerce--Econometric models--Congresses.