Documents such as the annual Global Competitiveness Report and Regional Risks for Doing Business include most problematic factors for doing business in specific countries and regions
Provides information on cultural differences between your country and the United States. Indicators include: individualism, power distance, masculinity/femininity, uncertainty avoidance, and long term orientation.
Several of your countries will have market research reports called "Doing Business in..." This report includes information on market entry strategy, legal issues, and selling U.S. goods in that country.
Reports on human rights in all countries of the world. Select "regions" and then name of country for a complete report that includes worker rights, corruption, and other economic issues.
Country specific business information that describes the business environment, foreign investment, setting up a business, and labor and tax information.