Bolivia’s first conservative president-elect in 20 years, Rodrigo Paz, has injected a sharp note of realism into his plan for solving Bolivia’s worst economic crisis in four decades. His first news conference as president-elect Monday came a day after his surprise electoral victory signaled the end of decades of leftist rule. After years antipathy toward the United States under the Movement Toward Socialism party, Paz promised to rebuild relations with the U.S. and attract foreign investment to a country long locked out of international markets. Paz is a centrist senator who was never a nationally prominent figure until the campaign.