In the neoclassical growth model for a closed economy, the saving rate is exogenous and equal to the ratio of investment to output. A higher saving rate raises the steady-state level of output per effective worker and thereby raises the growth rate for a given starting value of Gross Domestic Product (GDP). In any case, the growth of every nation depends on capital accumulation and subsequent investment. The rate of investment in any country could be influenced by both external and internal factors. A research student of UPSA investigated some of such factors in his project work. The study involves average ratios of real investment (private plus public) to real GDP over the period 1965-2018. The challenge of the student is how to interpret his results in Table 2.

Table 2: A regression output of determinants of investment in Ghana

Variable Coefficient Secondary school enrolment .733 Democracy index .327 Life expectancy 1.12 Inflation rate -.769 Government consumption ratio -.022 Fertility rate -.059 Terms-of-trade chmge .047 Interest rate

_cons -5.32

Standard Error .244

.019 .201 .042 .001 1.06

t-statistic 28.77

P-value

0.000 -21.58

-3.29 -4.99

0.000

Number of obs = F(8, 1557) = Prob > F = R-squared =

Adj R-squared = Root MSE =

1,566 33899.34 0.0000 0.9943 0.9943 1.0838

As a research student, you are required to assist the researcher by providing answers to the following questions:

i. identify the dependent and independent variables

ii. using 5% level of significance, identify and interpret the significant variables

iii. comment on the appropriateness of the overall significance of the model