The economic forces at work are supply &amp; demand, and a process referred to as voting with your feet. Every time someone or some society gives more to a homeless person they increase demand - in a sad twist of intentions and results they increase the negative effect they&#x27;re trying to alleviate. Homeless people are also able to move more easily as they have so few possessions and a lower cost of moving. If San Jose provides relatively better conditions for homeless people than Las Vegas, then San Jose ends up with a correspondingly higher homeless population.