Yang, BaojiangMatos, Miguel Godinho deFerreira, Pedro2021-03-172020-090276-7783http://hdl.handle.net/10400.14/32251In this research note, we study the welfare implications of shortening the length of the lock-in period associated with triple play contracts using household level data, from a large telecommunications provider, for a period of 6 months. Using a multinomial logit model to explain consumer behavior we show that, in our setting, shortening the length of the lock-in period decreases the aggregated profit of the firms in the market more than it increases consumer surplus. This result arises because shortening the length of the lock-in period increases churn, and the costs to set up service for the consumers that churn and join a new carrier supersede the increase in the consumers' willingness to pay for service when the length of the lock-in period shortens.engLock-in periodsSwitching costsTelecommunicationsMultinomial logitjournal article10.25300/MISQ/2020/1483985100330351000576761700011