Season Tickets and the Demand for Public Transport
研究了季票（一种两段收费制）对公共交通需求的影响，利用瑞士四个城市26年的数据发现季票显著提升需求，且引入廉价可转让季票并未永久降低收入增长趋势。
Season tickets generate two-part tariffs or public transport clubs with zero margin pecuniary cost of transport use for members. A simple model of the welfare gains from travel passes is tested using twenty-six years of data from four Swiss cities. Pooled and seemingly unrelated regression estimates reveal large and robust season ticket effects on transport demand. Quality proxies also have significant effects although data on complementary traffic restraint measures are unavailable. Revenue growth trends were not permanently reduced by the introduction of cheap, transferable season tickets which are, thus, shown to be important components of urban transport policy. Copyright 1999 by WWZ and Helbing & Lichtenhahn Verlag AG