Industry structure, foreign trade and price‐cost margins in Indian manufacturing industries
用多元回归分析考察了印度制造业中产业集中度、对外贸易和贸易保护对价格成本加成的影响，发现进口竞争压低加成、保护提高加成，而集中度呈倒U型影响。
The influence of industry concentration, foreign trade and protection on price‐cost margins in Indian manufacturing industries are examined with the use of multiple regression analysis. The tests show that import‐competition dampens the margins while protection has the opposite effect. Moreover industries with relatively higher exports appear to have higher margins. Industry concentration shows an inverted‐U‐shaped influence. This result may be due to restraints by large firms that apprehend anti‐monopoly regulation. However an empirical test suggests that the result may also be due to the effect of X‐inefficiency and/or higher wages in the more concentrated industries.