A Palestinian man has died after setting himself on fire, apparently in response to the economic hardships in Gaza, his family and the police said Monday. The man, Ehab Abu Nada, 18, left home on Thursday after an argument with his father, who had urged him to find work to help feed his family. Frustrated in his job hunt, he set himself on fire inside a Gaza hospital. He was pronounced dead on Sunday. A United Nations report published last week put the poverty rate at 40 percent among Gaza’s 1.6 million people and said nearly 30 percent were jobless.