A country may impose restriction on trade for the following reasons:
(i) To raise revenue.
(ii) To protect infant industries.
(iii) To maintain high level of employment.
(iv) To prevent the country from becoming a dumping ground.
(v) Restriction may serve as a retaliatory measure.
(vi) To prevent the importation of harmful goods.
(vii) To correct a deficit in the balance of payment.
(viii) To promote self - sufficiency