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Question: please explain carefully...

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10. Which of the following will presumably be the best measure of welfare connected with the functioning of a given market? a) consumers expected utility b) the producers profits the joint consumer and producer surplu d) the highest revenue from quantity taxes attainable in this market e) the turnover 11. Supply of a public good can be increased by: a a public intervention b) breaking the non-excludability principle c) privatization d) the incentivizing Groves-Clarke Tax e) all of the remaining answers are correct 12. Does negative correlation between the number of speed cameras and the number of accidents in a given country (both variables per km of road) constitute evidence of the effectiveness of speed cameras? a) No, because other factors correlated with the number of speed cameras can influence the number of accidents b) No, because other factors uncorrelated with the number of speed cameras can influence the number of accidents c) Yes d) No, most likely this is just an effect of the so-called regression to the mean e) No, because governments may react to a higher number of accidents by increasing the number of speed cameras

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