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α: calibrated so average coauthorship-adjusted count equals average raw count
Recent literature on tobacco taxation suggests that optimal tax rates should be very high. But such high taxes raise concerns over regressivity. Most econometric estimates of elasticities by income group use historic price data that are low, and the usefulness of such estimates is therefore questionable on account of the serious 'out of sample' prediction problem. To address that problem, this paper estimates price elasticities for different socioeconomic groups using recent Canadian survey data for a period during which prices rose to a level of about $7 per pack. The results provide little reason to overturn the traditional concerns about regressivity.