 Within this field there are many sub-fields, ranging from the broad philosophical theories to the focused study of minutiae within specific markets, macroeconomic analysis, microeconomic analysis or financial statement analysis, involving analytical methods and tools such as econometrics, statistics, economics computational models, financial economics, mathematical finance and mathematical economics.Economists work in many fields including academia, government and in the private sector, where they may also "...study data and statistics in order to spot trends in economic activity, economic confidence levels, and consumer attitudes.They assess this information using advanced methods in statistical analysis, mathematics, computer programming [and] they make recommendations about ways to improve the efficiency of a system or take advantage of trends as they begin."