Cárdenas also nationalized the paper industry, whose best-selling product was newsprint. In Mexico the paper industry was controlled by a single firm, the San Rafael y Anexas paper company. Since there was no well-developed capital market in Mexico ca. 1900, a single company could dominate the market. But in 1936, Cárdenas considered newsprint a strategic company and nationalized it. By nationalizing it, a company with poor prospects for flourishing could continue via government support. During the 1930s, agricultural production also rose steadily, and urban employment expanded in response to rising domestic demand. The government offered tax incentives for production directed toward the home market. Import-substitution industrialization began to make a slow advance during the 1930s, although it was not yet official government policy.