Answer

Country competitiveness can be defined as the set of institutions, policies and factors that determine the level of productivity of a country”.  A competitive economy is a productive one and productivity leads to growth, which leads to improved income levels. 

Organizations that provide rankings of country competitiveness include:

World Economic Forum's Global Competitiveness Report

Institute of Management Development (IMD) produces the IMD World Competitiveness Rankings 
Historical copies are available in print in Bobst Library World Competitiveness Report (1985-1995) World Competitiveness Yearbook (1996-2001) and IMD World Competitiveness Yearbook (2002-2010)