The economics of tobacco control in some African countries

This thesis examines some aspects of the economics of tobacco control in South Africa, Uganda and Zambia. The first part of the thesis examines whether tobacco expenditure displaces (or "crowds out") expenditure on other goods and services within Zambian households. In so doing, I make two contributions to the literature. Firstly, I use expenditure data from a low-income sub-Saharan African country where most households are poor. Secondly, I use the standard instrumental variable used in the literature, the adult sex ratio, to instrument for the tobacco smoking status of Zambian households. But unlike previous studies, I relax the strict exclusion restriction and allow for the adult sex ratio to be correlated with the error term. That is, I allow the instrumental variable to be imperfect. I consider the relaxation of the exclusion restriction to be reasonable given that the adult sex ratio is just as likely to influence tobacco expenditure as it is to influence expenditure on other goods and services. Even after relaxing the exclusion restriction, I, however, confirm many findings in the literature. For instance, I find that smoking households allocate less expenditure towards food, schooling, clothing, water, electricity, transportation, equipment maintenance and remittances. In addition, the crowding out patterns I uncover are in some ways related to the geographical location of households which in turn is related to socioeconomic status in Zambia. In sum, the results in this part of the thesis show that a broader accounting of tobacco's costs in Zambia should include other costs over and above mortality and morbidity considerations. We know from several studies that tax and price measures are the single most effective policy tool for reducing tobacco consumption. However, most of this evidence is based on studies conducted in developed countries with very few published studies on African countries. The second part of my thesis, therefore, contributes to the recent literature that uses expenditure data to estimate price and expenditure elasticities of demand for tobacco products in Low-and Middle-Income countries. I use expenditure data from Uganda and exploit the fact that prices of cigarettes vary across geographical space. I also adjust my demand elasticity estimates for measurement error and quality heterogeneity. I find price and expenditure elasticities that are in line with international evidence. For instance, I find that cigarette demand is expected to decline by between 3% and 4%, at the very least, for every 10% increase in cigarette prices. The authorities in Uganda ca n, therefore, reduce cigarette consumption by increasing excise taxes on cigarettes without reducing tax revenues. The third and final part of my thesis evaluates the impact on per capita cigarette consumption of South Africa's consistent excise tax increases that began in 1994. The tax rises have overtime translated into large increases in the inflation-adjusted price of cigarettes. For instance, the average real price per pack increased by 110% between 1994 and 2004. The main challenge in conducting pol icy evaluations is that of creating a credible counterfactual. That is, we want to know what would have happened to per capita cigarette consumption in South Africa if the excise tax increases had not occurred. This is particularly important in the case of South Africa because per capita cigarette consumption had already started declining by the time the tax rises started. I, therefore, use a transparent and data-driven technique, the Synthetic Control method, to create a credible counterfactual of South Africa's cigarette consumption after 1994. The counterfactual is constructed as a linear combination of the per capita cigarette consumption of countries that are similar to South Africa but did not engage in large-scale tobacco control efforts over the peri od 1994 to 2004. I find that per capita cigarette consumption would not have continued declining in the absence of the consistent tax rises that began in 1994. Specifically, I find that by 2004, per capita cigarette consumption was 36% lower than it would have been had the tax increases not occurred. This result is robust to several falsification (or placebo) exercises. Based on these results, I conclude that countries in Africa can achieve substantial reductions in cigarette consumption and prevent uptake from new smokers by consistently increasing excise taxes in the manner of South Africa.

Grantor dc:publisher.institution

School of Economics

Year dc:date.issued

2015

Author dc:creator

• Chelwa, Grieve

Advisor dc:contributor.advisor

• Van Walbeek, Corne

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/11427/16529

OAI identifier oai:identifier

oai:open.uct.ac.za:11427/16529