These guides are produced by the US Department of Commerce and are tailored specifically to US companies looking to do business abroad. They cover the business and economic environment in that country and trade policies and regulations in that country.
Latvia Country Commercial Guide
Slovenia Country Commercial Guide
The International Trade Administration also compiles information on trade with individual countries here
State Department reports and country overviews can be found by mousing over the "countries and areas" tab and selecting a country. Look for overview information in reports titled: U.S. Relations with ....
The Commerce Department's Bureau of Economic Analysis provides current and historical data on international trade including data on U.S. direct investment abroad as well as foreign direct investment.
This Office provides detailed, annual reports including the National Trade Estimate Report. The report provides a country-by-country analysis of trade barriers, trade agreements and the business environment. In addition, a tab at the top of this page allows one to look for specific country/regional information.
Individual Country Central Banks.
Central banks are government run agencies that oversee banks, banking regulations and monetary policy in their home countries. As such, they create, collect and compile a wealth of information on the country’s financial and economic status and situation.
The Bank for International Settlements is an international membership institution that promotes cooperation among the world’s central banks. The link above is a list of central banks.
Select your country from this list. Look for terms like "statistics", "data", etc. for up-to-date and time-series financial and economic data.
Scroll down to the hyperlinked list of EU countries. Select your country for specific information and standards regarding doing business in that country.