Second, import protection hurts consumers. Not only will they have to pay more for world-class goods that they would normally prefer to buy, but even the lower-quality goods produced domestically will raise their prices. If a foreign good costs Rs x+t after the introduction of a tariff t, then a domestic and less preferred substitute that earlier sold for Rs y, where y<x might well raise its price to Rs y+t and make more profits.
Third, it hurts exports, though this effect may not be completely obvious at first. It has, however, been understood by economists since Abba Lerner explained it in 1936. He demonstrated that higher tariffs meant that imports become more expensive than domestic goods. This also means exports become less remunerative as compared to domestic goods, creating a disincentive to export. Higher tariffs also raise costs throughout the economy, which means that exports are generally rendered less competitive than earlier. And, of course, tariffs put upward pressure on the exchange rate, and an even more over-valued rupee will further hit exporters. Many studies of protected economies show that about half of any import protection can be shown to have an effect equivalent to a direct tax on exporters.