When he entered office, Mexico was in the midst of an economic crisis. He undertook an ambitious program to promote Mexico's economic development with revenues stemming from the discovery of new petroleum reserves in the states of Veracruz and Tabasco by Petróleos Mexicanos (Pemex), the country's publicly owned oil company. In 1980, Mexico joined Venezuela in the Pact of San José, a foreign aid project to sell oil at preferential rates to countries in Central America and the Caribbean. The economic confidence that he fostered led to a short-term boost in economic growth, but by the time he left office, the economy had deteriorated and gave way to a severe debt crisis and a sovereign default.