Table 6 Estimates of the cost function
From: Size, efficiency, market power, and economies of scale in the African banking sector
Parameters | Regressors | Coefficients | Standard Errors |
|---|---|---|---|
α 0 | Constant | −0.2502b | 0.1358 |
α Q | ln Q | 0.8683a | 0.0331 |
α 1 | lnW1 | 0.0559 | 0.0623 |
α 2 | lnW2 | 0.5919a | 0.1143 |
α 3 | lnW3 | 0.2037a | 0.0557 |
α QQ | (lnQ)2/2 | 0.0127c | 0.0067 |
α 11 | (lnW1)2/2 | −0.0139 | 0.0242 |
α 22 | (lnW2)2/2 | −0.1034c | 0.0614 |
α 33 | (lnW3)2/2 | −0.0935a | 0.0262 |
α Q1 | lnQ × ln W1 | −0.0389a | 0.0086 |
α 12 | lnW1 × ln W2 | −0.0214 | 0.0305 |
α 13 | lnW1 × ln W3 | 0.0335 | 0.0271 |
α Q2 | lnQ × ln W2 | −0.0068 | 0.0130 |
α 23 | lnW2 × ln W3 | −0.0240 | 0.0279 |
α Q3 | lnQ × ln W3 | 0.0003 | 0.0078 |
Log-likelihood | 1021.2181 | ||
Wald Chi-square | 19,818.07a | ||
Observations | 900 | ||
Banks | 151 | ||