SOCIAL GAIN,WELFARE, POLITICAL ECONOMY AND A' THAT

The economic criterion of public investment choice is aggregate consumers' surpluses and producers' rents generated by the investment. Its analytical model is a social revenue function and a social cost function. It is a welfare criterion only so far as efficiency is a welfare component and then subject to severe limitations. It is argued here that the economist's conclusions rest in part on a set of value preferences; therefore, the test of their rightness is in part their acceptability to the public choice-maker.     

On the dynamic effects of global commodities on stock market blocks in Africa

This article explores the commodity–equity links in the Africa markets by distinguishing between short- to long-run co-movements driven by market shocks. Using the value-weighted average method, available Africa’s stock markets are aggregated into four market blocks. Global oil and gold returns are used as proxies for commodities. Coherency between pairs of markets is examined with the use of continuous Morlet wavelet transform. Results reveal abstemiously high degree of co-movements between the commodity–equity markets in the short- to medium-term frequencies with nonhomogenous lead–lag nexuses, signifying greater benefits of diversification in the long-term. These findings provide investors with relevant strategies for hedging.     

Discount rates and shadow prices for public investment

This paper extends the Harberger–Sandmo–Drèze model for public discount rates to a many-good economy. It derives a formula for discount rates which are specific to each public enterprise or agency and used by them to discount future outputs and inputs evaluated at market prices. Such an approach is shown to be more efficient than that of simply using a single rate for all public projects. It is also more practical than asking each public firm to use second-best shadow prices in their analyses of investment projects.The general results are first provided; then, simple cases are considered and numerical examples presented to help interpret our formula and analyse its main determinants.