In many jurisdictions, domestic lotto games have experienced a decline in sales revenue due to the introduction of new products and the absence of appealing jackpots. To reverse this trend, operators worldwide have conducted major reforms to the design of games. In this paper, we focus on Spain's largest domestic lottery game, which was redesigned in 2012 by significantly reduced the odds of winning the jackpot to produce more frequent and larger rollovers. Findings show overall negative results of such reform, as players seem to no longer react to large jackpots, and the declining trend in sales has even worsened. (JEL D12, H27, L83)

中文翻译：

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设置大奖的赔率：关于（重新）设计彩票游戏的经济学

在许多司法管辖区，由于引入了新产品以及缺乏吸引人的头奖，国内乐透游戏的销售收入有所下降。为了扭转这种趋势，全球运营商已对游戏设计进行了重大改革。在本文中，我们重点介绍西班牙最大的国内彩票游戏，该游戏于2012年进行了重新设计，其方法是显着降低赢得大奖的机会，以产生更频繁和更大的翻滚。调查结果显示出这种改革的总体负面结果，因为玩家似乎不再对大头奖做出反应，而且销售下降的趋势甚至恶化了。（JEL D12，H27，L83）