Gross domestic product
Gross domestic product (GDP) is a monetary measure of the market value of all the final goods and services produced in a period of time, often annually 
GDP (nominal) per capita does not, however, reflect differences in the cost of living and the inflation rates of the countries; therefore using a basis of GDP per capita at purchasing power parity (PPP) is arguably more useful when comparing differences in living standards between nations.
Tbilisi
With a GDP at basic prices of 12,147 Million Georgian lari(€4.3 billion) in 2014, Tbilisi is the economic center of the country, generating almost 50 percent of Georgia's GDP. The service sector, including government services, is dominating and contributes 88 percent to GDP. Its GDP per capita of 10,336 Georgian Lari(€3,600) is exceeding the national average by more than 50 percent. The service sector itself is dominated by the wholesale and retail trade sector, reflecting the role of Tbilisi as transit and logistics hub for the country and the South Caucasus. The manufacturing sector contributes only 12 percent to Tbilisi's GDP, but is much larger, by employment and total value added, than the manufacturing sectors in any other region of Georgia. The unemployment rate in Tbilisi is – with 22.5 percent – significantly higher in Tbilisi than in the regions.