Foreign investors are allowed to create businesses in other sectors, but only if they meet some tough requirements. For example, “a person who is not a citizen may engage in a trading enterprise if that person invests in that enterprise no less than one million United States dollars,” and “employ[s] at least twenty skilled Ghanaians.” The definition of trading “includes the purchasing and selling of imported goods and services” but, in a typically mercantilist fashion, trading for the purpose of exporting Ghanaian goods is not restricted.
Ghanaians also suffer from tariffs and other trade barriers. The latest Freedom of the World index ranks Ghana 113th out of 162 in freedom to trade internationally. Other developing countries on the list include Indonesia (94th), India (131st), and Sri Lanka (143rd), showing they too are ensnared in protectionist cultures and policies. China ranks 99th; before President Trump launched his trade war, the United States ranked 55th.
Hong Kong and investment / Restricting both foreign investment and imports is not inconsistent. What is inconsistent is what the current U.S. administration does: restrict imports and claim to favor foreign investment. Other things being equal, the two move together because foreign investment is one way in which foreigners spend the dollars (or other foreign currencies) they earn from exports. The fewer imports come into a country, the less foreign investment flows in. If a country restrains imports, it discourages foreign investments, and vice-versa.
Consistent openness to the world is good economic policy. Consider Hong Kong, which has had no tariffs and virtually no non-tariff barriers since World War II. (Hong Kong ranks first in the world on both the general Freedom of the World index and its international trade component.) In 1950, the gross domestic product per capita of this tiny territory with no natural resources was 26% of American GDP per capita. By the time the territory was ceded to the Chinese government in 1997, the ratio had reached 85%. It then eclipsed the United States, before the Great Recession and a subsequent difficult recovery slowed Hong Kong down. Moreover, the future of what has become a world financial center has certainly not been boosted by the tightening grip of the Chinese government.
Figure 1 compares Hong Kong to the countries mentioned above. Hong Kong’s remarkable growth rate surpassed even China’s until the cession of the former to the latter (marked by the vertical bar). Hong Kong’s general free-market environment helped this, but the specific freedom to trade internationally certainly played a major role, as economic theory and most econometric studies suggest. The liberalization of trade in China and some other developing countries explains part of their recent growth.