Introducing taxes, subsidies or both: the effects of various food pricing strategies in a web-based supermarket randomized trial.

AbstractObjectiveFiscal policies may form a solution in improving dietary intake. This study aimed to examine the effectiveness of varying taxing and subsiding schemes to stimulate healthier food purchases.MethodsA randomized controlled trial with three levels of price reduction on healthy foods (no; 25%; 50%)×three levels of price increase on unhealthy foods (5%; 10%; 25%) factorial design was used. 150 participants were randomized into one of nine conditions and were asked to purchase groceries at a web-based supermarket. Data were collected in the Netherlands in January–February 2010 and analyzed using analysis of covariance.ResultsSubjects receiving 50% discount purchased significantly more healthy foods than subjects receiving no (mean difference=6.62 items, p<0.01) or 25% discount (mean difference=4.87 items, p<0.05). Moreover, these subjects purchased more vegetables (mean difference=821g;p<0.05 compared to no discount). However, participants with the highest discount also purchased significantly more calories. No significant effects of the price increases on unhealthy foods were found.ConclusionPrice decreases are effective in stimulating healthy food purchases, but the proportion of healthy foods remains unaffected. Price increases up to 25% on unhealthier products do not significantly affect food purchases. Future studies are important to validate these results in real supermarkets and across different countries

Energy governance in the United Kingdom

The UK’s energy transition path has been shaped by a legacy of fossil fuel use across electricity generation, transport and heat, but also by the institutions and ideas that make up the governance of energy. Some important elements, such as a market-led policy paradigm and the delegation of regulation to arm’s-length bodies, are the result of privatization in the 1980s. Others, such as a heavily centralized, supply-led power sector and a resilient nuclear lobby, are continuities from an earlier period. This governance system, strongly concentrated within central government, was challenged in a major way in the 2000s by a wave of concern about climate change. This driver has meant that the UK energy transition has been primarily about emissions reduction, rather than specific technologies such as renewable energy, whose expansion in the UK has largely been the result of European-level policy. With a preference for incentive-based and internalizing instruments over direct regulation arising from the market-led paradigm, the UK has managed to bring about a major decline in power sector emissions and some increase in renewable energy, especially in electricity generation, while at the same time trying to support a program of new nuclear build. However, as the country now enters the next phase of transition, involving integration of intermittent renewables into electricity sector systems and institutions, and of transport and heat into electricity, the coherence of policy, clarity of direction, and coordination of regulatory change are all open to question