21. Littman has created his own Detroit Comeback Index, which measures 23 social and economic variables in Detroit. 22. Under adaptive expectations, expectations of the future value of an economic variable are based on past values. 23. These are all statements about the partial effect of each economic variable , holding the other variables fixed. 24. Also, business economics extends to government policy, economic variables and international factors which influence business and competition. 25. Another major economic variable will be employment. 26. Each of the three effects is defined as a percentage of the beginning value of the economic variable . 27. The secretary routinely uses the economic variables of foreign investment, tourism and trade in his equation for national security. 28. The model introduced a then-new concept to shift-share analyses, a homothetic level of the economic variable within an industry. 29. Some might argue that any fiscal adjustment will take time and there will be changes in other economic variables . 30. At Prediction Co .'s offices, computer work stations running pattern-recognition software scrutinize some 50 to 100 financial and economic variables .
