Most economists prefer as the best indicator of current economic performance.

Most economists prefer real GDP growth as the best indicator of current economic performance. Real GDP is the gross domestic product in constant dollars. In other words, it is a nation's total output of goods and services, adjusted for price changes. The real GDP allows economists to make useful comparisons of a nation's output and services by eliminating the effect of price changes. It is also known as inflation-corrected GDP and constant-price GDP.

"undercapitalization"  is best described as the lack of funds to operate a business normally.