Conditions for Optimality of a Currency Area

Two approaches to the theory of OCA are distinguished in this paper. The first, called the marginalistic approach, attempts to define the OCA from the point of view of a single country, and the second examines the optimality of a currency area of a given membership. The marginalistic approach and its limitations are discussed first. Then, the paper proceeds to the second approach which is discussed in the context of the cooperative game theory in characteristic function form; it argues that a currency area is optimal when the welfare functions of its constituent members are in the core. This implies that the welfare functions of all constituent members of the currency area are maximized and hence they are all better off with a common currency rather than with their own national currencies; hence, no member country has the intention to abandon the currency area. The paper concludes that the condition for the optimality of a currency area independently of the degree of economic similarity of its constituents requires that the characteristic function must exhibit non decreasing returns with respect to its size.     

Flight Delays and Passenger Preferences: An Axiomatic Approach

The U.S. Department of Transportation (DOT) defines a flight as “delayed” if it arrives 15+ minutes late. The DOT “flight counting” delay definition is used to rank airline/airport service quality. An obvious caveat of counting flight delays is that the duration of delay plays no role in the delay count. The purpose of this article is to propose an aggregate delay measure that is sensitive to the distribution of time delayed among passengers. The importance of this work is that our derived delay measure reflects passenger preferences rather than the arbitrary delay cutoff established by the DOT. We model passengers' preference ordering using the criteria that passengers prefer fewer, shorter, and more equal delay times.     

Why Do Property‐Liability Insurers Destroy Liquidity? Evidence from South Africa

This paper examines liquidity creation behaviour in the property‐liability insurance market in South Africa. Using annual data on 76 insurers from 2007 to 2014, the paper employs the three‐stage approach to estimate liquidity creation. The results suggest that property‐liability insurers are characterised by liquidity destruction by transforming liquid assets in cash and investable securities into illiquid reserves liabilities. The findings also indicate that the R1.32 billion in liquid assets were transformed into illiquid reserves liabilities in 2014, an increase from the R700 million liquidity de‐created in 2007. The increases were mainly driven by large insurers which accounted for about 70% liquidity de‐created. The results of panel regression analysis provide evidence in support of the “risk‐absorption” hypothesis which argues that high levels of capital increases liquidity creation. In addition, size, leverage and reinsurance were also identified as the firm‐level factors that explain liquidity creation. The policy implications of the findings are discussed.     

Binding constraints to productive investment in Malawi: A modified HRV framework

The paper applies a modified Hausmann, Rodrik, and Velasco (HRV) growth diagnostics framework to analyse Malawi's growth challenges. The study finds five critical binding constraints affecting productive investment and output growth in Malawi. These include land administration, taxation, customs and trade regulations, political governance, and cost‐of‐finance. Land constraints are evidenced by highly urban and rural population growth, an inverse co‐movement between the rural population and investment per capita, and low land administration indices. Tax constraints are evidenced by the negative growth of investment per capita. Customs and trade regulations constraints are evidenced by nontariff measures, such as high costs and the time it takes to export and import. Political governance constraints are evidenced by rising government debt and the low score on transparency, accountability, and corruption based on the World Bank's Public Transparency Scale. Lastly, high cost‐of‐finance constraints are evidenced by monetary policy challenges, such as high real interest rates, inflation rate, uncompetitive exchange rate, and foreign aid ineffectiveness. Therefore, we recommend that the formulation of crucial policy strategies to alleviate these five significant binding constraints be encouraged. The government should base such an approach to sound growth therapeutics that fully account for each challenge's root causes.     

Interest Rate Liberalization and Economic Growth in Zambia: A Dynamic Linkage

Abstract: This paper examines the dynamic impact of interest rate reforms on economic growth in Zambia—using two models in a stepwise fashion. In the first model, the efficacy of interest rate liberalization is examined by regressing the interest rate on the level of financial deepening. In the second model, the causal relationship between financial depth and economic growth is examined by incorporating savings as an intermittent variable in the bivariate setting, thereby creating a simple trivariate model. Using the cointegration‐based error correction model, the study finds strong support for the positive impact of interest rate liberalization on financial deepening. In addition, the study finds that financial deepening, which results from interest rate liberalization, Granger causes economic growth. The results apply irrespective of whether the causality is estimated in the short run or in the long run. Other results show that: (1) lagged financial depth leads to further financial deepening; (2) savings and economic growth Granger cause each other; and (3) financial development Granger causes savings in the long run.     

Real exchange rate misalignment and business cycle fluctuations in the Asia-Pacific

Real exchange rate (RER) misalignment, which is the deviation between the actual real exchange rate from its equilibrium, occurs frequently among developing countries. Studies have shown that RER misalignment may have negative economic implications, such as a decline in economic growth, exports, and export diversification and an increased risk of currency crises and political instability. Using quarterly data for 22 sample countries from 1990 to 2018, this paper investigates the impact of RER misalignment on business cycles in the Asia-Pacific by employing a panel vector autoregression involving consumer price index (CPI) inflation, output gap, short-term interest rates, and RER misalignment. We find that RER overvaluation may reduce CPI inflation and short-term interest rates. We also find that the Asia-Pacific region is highly heterogeneous in that the output gaps of some countries, particularly from the Southeast Asian region, are more susceptible to RER misalignment shocks.     

Supply‐leading versus Demand‐following Hypothesis: Empirical Evidence from Three SSA Countries

Abstract: This study investigates empirically the direction of causality between financial development and economic growth in three sub‐Saharan African countries — Kenya, South Africa and Tanzania. The study seeks to answer one critical question: Does financial development in sub‐Saharan African countries exhibit a supply‐leading or demand‐following response? Using three proxies of financial development against real GDP per capita (a proxy for economic growth), the study finds that the direction of causality between financial development and economic growth is sensitive to the choice of measurement for financial development. In addition, the strength and clarity of the causality evidence is found to vary from country to country and over time. On balance, a demand‐following response is found to be stronger in Kenya and South Africa, whilst in Tanzania a supply‐leading response is found to be dominant. The study therefore recommends that for Kenya and South Africa the real sector of the economy should be developed further in order to sustain the development of the financial sector. However, for Tanzania, there is need for further development of the financial sector in order to make the economy more monetized.