(PRIDCO) — encouraged the establishment of factories. Following the Elective Governor Act of 1947 (also known as the Crawford-Butler Act), Marín was elected the first governor of Puerto Rico while under U.S. control, paving the way for the full establishment of Operation Bootstrap across the island. According to Virginia Sanchez Korrol from the Center for Puerto Rican Studies, Operation Bootstrap was based on 3 essential elements: “1) industrialization by invitation: the inducement of American corporations to relocate in Puerto Rico in exchange for lucrative tax benefits; (2) a cheap labor pool, educated in the English language and under a U.S. imposed curriculum; (3) proposed emigration of over a third of the island’s population, a security measure to insure the plan’s viability.” The US government in Puerto Rico enticed US companies by providing labor at costs below those on the mainland, access to US markets without import duties, and profits that could transfer to the mainland free from federal taxation. The Administration of Economic Development invited investment of external capital, importing the raw materials, and exporting the finished products to the mainland. To entice participation, tax exemptions and differential rental rates were offered for industrial facilities. As a result, Puerto Rico's economy shifted labor from agriculture to manufacturing and tourism. The manufacturing sector has shifted from the original labor-intensive industries, such as the manufacturing of food, tobacco, leather, and apparel products, to more capital-intensive industries, such as pharmaceuticals, chemicals, machinery, and electronics. Through this project, a rural agricultural society was transformed into an industrial working class. Although initially touted as an economic miracle, by the 1960s, Operation Bootstrap was increasingly hampered by a growing unemployment problem. As living standards and wages in Puerto Rico rose, manpower-intensive industries faced competition from outside the United States. It also faced criticism from civil rights groups and the Catholic Church, who perceived the government promoting birth control, and engaging in non-consensual surgical sterilization. American industrialists influenced by eugenicists policies were concerned with "overpopulation" and a perceived lack of self-control on the part of the working class Puerto Ricans. As of 2005 the continental United States remains Puerto Rico's major trading partner, received 86% of Puerto Rico's exports and providing 69% of its imports. Effects Increased Living Standards Those able to secure a stable job as a result of Operation Bootstrap received higher wages than before, in fact, " The average real weekly salary in manufacturing