Macro-studies have used different proxies of education (quantity and quality). The main proxies of the education quantity are measured by: a. schooling enrolment ratios (Barro, 1991; M-R-W, 1992; Levine and Renelt, 1992; et al), b. the average years of Education/Schooling (Hanushek and Woessmann, 2007; Krueger and Lindhal, 2001; Woessmann, 2007; et al), c. adult literacy rate (Romer, 1990; Durlauf and Johnson, 1995; et al), d. education spending. The education quality proxies are measured by: a. survival rates, b. repetition rates, c. student/teacher ratios, d. schooling life expectancy, e. trained teachers in primary education, f. education test scores and …show more content…
The overall conclusion suggests the existence of a bidirectional or a unidirectional causal relationship between education quantity and economic growth. There however are, studies that find a weak or a negative effect of education quantity on economic growth (Islam, 1995; Bils and Klenow, 2000; Pritchett, 2001) and others that found no relation between education quantity and economic growth (Benhabib and Spiegel, 1994). More specifically, Krueger and Lindahl (2001) in their survey on education and economic growth found that “education is statistically significantly and positively associated with subsequent growth only for the countries with the lowest level of education”. Tsamadias and Pegkas (2012), have been investigating if the different proxies of human capital affect the estimations of education quantity on economic growth. The relationship between education quality and economic growth has been examined by a few studies. The studies of Hanushek and Kim (1995), Hanushek and Kimko (2000), Hanushek and Woessmann (2007), developed a measure of labour force quality based on cognitive skills in mathematics and science and found that cognitive skills have a strong and robust influence on economic growth. Barro (1999) employs data on student scores