I don't know about Europe in general. Here in Switzerland the majority of landlords are pension funds, which are constrained investment companies with a social

I don't know about Europe in general. Here in Switzerland the majority of landlords are pension funds, which are constrained investment companies with a social obligation. As such, they normally own upwards of 1000 apartments/houses at a time. They price their properties according to market but they cannot adjust beyond certain thresholds because the risk ratio would exceed what they're allowed to have.