October 24, 2023 – Room 1038 – 14.30h

The burning of fossil fuels such as coal, oil and gas emits gases into the atmosphere that act like the glass roof of a greenhouse, trapping the sun’s heat and preventing it from escaping into space, thereby increasing the temperature of the planet. This warming of the Earth is causing the climate to change in ways that constitute a serious threat, due to the negative natural, social and territorial consequences that it may generate.

10 de marzo – SALA RAMON Y CAJAL – 11h-13.15h

In a two-country model, the citizens of a ‘big home country’ can either fictitiously move residence to a ‘small foreign country’ where residence-based taxes are lower (external tax avoidance), or under-report the tax base at home (internal tax avoidance). Tax setting is the result of Cournot-Nash competition between revenue maximizing governments, with the home government also setting two types of administration policies, one for each form of tax avoidance. We show that although it is optimal to employ both types of administration policies, which in themselves are both effective at tackling the targeted form of tax avoidance, the optimum is characterized by a tradeoff in terms of policy outcomes: either internal avoidance increases and external avoidance decreases, or the opposite, depending on the characteristics of the fiscal environment.

Individual preferences over public policies should ideally be based on the possession of correct information about their reality. To test whether this holds, we conducted four waves of a survey, every six months since May 2020 (still under the COVID-19-lockdown), asking basic macro questions regarding the level of tax burden, of public debt, and of the underground economy in Spain. The percentage of correct responses (defined within broad ranges) never reaches 35%, and it is by far lowest for public debt. For the tax burden, left-wing individuals (with respect to right-wing) make more errors, and highly educated people (with respect to the rest of society) make fewer. No clear deterministic patterns arise for public debt and for the underground economy. Independently of the percentage of errors, we infer the existence of relative biases across different social characteristics: highly educated people tend to undervalue the level of the tax burden and of the underground economy and overvalue the level of public debt; leftist individuals undervalue the level of the tax burden and of the public debt but overvalue the level of the underground economy. There are also significant gender biases: with respect to men, women overvalue the tax burden and the importance of the underground economy, and undervalue the level of public debt. This misinformation and biases correlate with the marginal willingness to pay taxes (MWTP). MWTP is 10% higher under the presence of misinformation. This is particularly so for those individuals who undervalue the real level of the tax burden. Although COVID-19 generates greater interest to collect information, including about fiscal issues, there is a decrease in knowledge. The pandemic seems to have produced an excess of information up to causing misinformation. We also observe a general tendency to undervalue the level of public debt provoked by the exposure to COVID-19, which might be caused by the lax fiscal policy carried out during the pandemic.

February 14, 2023 – Room 1038 – 14.30h