Use Business Source Complete to find articles from scholarly and trade publications.

• Search for shadow economy or underground economy.

Go to Global Financial Data (GFD) where you will find time series of black market exchange rates for about 50 countries. Note: Users must authenticate with their HawkID, then log in to GFD.

• In the left-hand column, under Series Type, use the drop-down menu to choose Exchange Rates - Black Market.

Search IZA, an independent research firm with a focus on labor markets, for articles and working papers.

• Use the Publications menu to select Discussion Papers.
• Then, perform a keyword search for shadow economy.