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Prof. Gorton and Prof. Metrick of the Yale School of Management review 16 scholarly studies and papers on the causes of the 2008-2009 global financial crisis in the current isue of the Journal of Economic Literature. Another article in the same journal reviews 21 books on the subject. Samuelson says the most cited causes- lax regulation and passive regulators, and the policy of home ownership that encourage the packaging and of securitization of mortgages to government sponsored agencies Fannie Mae and Freddie Mac- are only the surface causes. If we are to explain how a whole society seemed to believe in the idea that somehow there was a way to maintain a rising tide continuously, with only small corrections over several decades, by the clever manipulation of monetary and fiscal policies; then one has to look to the hubris of economists who acted as if this was possible and the gullibility of business and a public that desperately wanted to believe as some have put it "that this time it was different," or that shrewd management of economic policy could actually bring about such a panacea. The abiding lesson is economic policies based on a better understanding of how modern industrial economies work are merely useful tools, no more no less, and there is no substitute for a good ethic, wise management and careful thinking on the part of the public, business and government, particularly for the people in leadership positions. ...

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Barry Ritholtz lists the causes of the financial crisis, He says New York Mayor Bloomberg's exoneration of the financial industry is simply false- what he calls "the Big Lie"- even though Congress, regulators and the Greenspan Fed acted irresponsibly and created favorable conditions for the actions of the financial industry.

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Porter of the NYT points out that the figures released from census information that the U.S. median household income increased by 5.2% in 2015 to $56,500 is good news for Americans including minority and working class families at the lower tiers. However more needs to happen compared to previous recoveries in the mid-90's, and for people who suffered during the recession to finally put that experience behind them, says Porter. 

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A recent book "The Spirit Level" has become popular in Britain. It says that countries with greater disparities in income also do worse in a number of social indicators, from higher murder rates to lower life expectancy. It also affects the consensus in society which is a necessary underpinning for sustained economic development and economic growth. Inequality when it affects the middle class and reduces the size of incomes in the middle, or creates stagnation in incomes, poses large risks for society and affects economic growth. In the US the home foreclosure crisis and the lack of bargaining power of wage earners in the middle class has created this problem. This is exacerbated by the banking crisis and bad loans in the banking system. Studies show that slow growth in college graduating rates in the USA after 1970 compared to the period 1900-1970, has increased inequality, especially with today's knowledge economy. Germany is also affected by this problem as wages for workers have remained stagnant with the labor reforms. Interestingly a combination of economic growth and payments to the poor have increased the size of the middle class and its incomes in Brazil. The austerity policies in Britain will affect incomes and income growth in Britain for the middle class. In China the gap is widening quickly between the urban areas and the rural areas. And the policy of residency permits- the hukou system-which limits internal mobility from rural areas to the cities and towns, makes the inequality all the more glaring. The lack of democratic election makes the situation worse in China compared to Brazil, because free elections in Brazil enabled leaders from the working classes such as Luiz Inacio Da Silva and Ms. Rousseff to emerge as heads of government. These leaders pursued policies that would explicitly bring a more shared prosperity in Brazil compared to the leadership in China. In China policies are determined by entrenched interests in its model of development- the state-owned companies and banks and their managers, local and government officials of the Communist party, and businesses with the networks and connections with the Communist party and local governments. This is why the ginni coefficient which measures inequality has dropped significantly in China, putting it in the rank of developing countries with poor records in equality. Inflation in China, India and Africa also affects the poor and lower middle classes to a greater extent. Current trends suggest that rebuilding the middle class in the developed countries and providing fairer distribution in developing countries will be of serious importance in coming years. Especially with the likelihood of more economic crises which tend to adversely affect the middle and lower classes disproportionately....