Studying the effect of increased income can be difficult because purposive social experiments are often not possible. However, your textbook notes a set of natural experiments on the effect of income, which were analyzed by economists, including Imbens, Rubin, and Sacerdote. In these studies, an increase in income came from

Gambling

Explanation:

Gambling is the act of incurring money or a valuable item at an event or an occasion with an uncertain outcome and with the intent of winning.

Gambling

Explanation:

Though gambling has social costs which include the Psychological aspects of gambling for instance now gamblers may have depression when they loose a lot of money into gambling and which may eventually leads to loss of lives Also, the the social cost if gambling will allow an increase in criminal rate. Nonetheless, according to some economists gambling can be used as economic development if gambling in been monitored and structure in a good way. Some of this economists believes that gambling can increase income rate and also the government revenue.

the historians cited in the article all agree with one another about the cause of the civil war. despite coming from different backgrounds and cultures, the historians agree that slavery was the root cause of the civil war. the fact that all these historiansgenerally agree with one another makes their shared viewpoints more reliable and valid, especially because the historians have different backgrounds and all work for the well-respected institutions of howard university, clemson university, and the university of colorado.

the arab empire adopted the muslim religion as their main belief. arabs would influence the people from the territories they invaded towards islam (the muslim belief).

nevertheless, throughout the history of the arab empire, rulers brought intellectual individuals from other religions to their centers of learning. these other foreigners included jews, christians, greeks, persians, and indians.   these resulted in the adoption of important knowledge developed by these cultures by the arabic empire. for example, the works of aristotle were translated from greek to arab and indian scientists brought the numerical concept of "zero" to the arabs.

nowadays, 93% of the arab population is muslim, which at the same time is subdivided in sects including the sunni, zaini, alawi, shia. the remaining 7% is composed mainly of christians.