what is the best neighborhood to live in in philadelphia?
Rittenhouse Square
contradiction
 As of 2012 , Manhattan 's real estate market for luxury housing was among the most expensive in the world . 

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 Because of higher air pollution , the life expectancy of a person born in the city in 2014 , is four years fewer than in the suburbs . 

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 Once the students had become settled , Raymond sought real @-@ world projects for them to work upon , to put his theories into practice . Projects included an assortment of houses and extensions in New Jersey , Connecticut and Long Island . 

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 After World War II , land developers began to buy land just outside the city limits of larger cities to build mass quantities of inexpensive tract houses . One of the first examples of planned suburbanization is Levittown , Pennsylvania , which was developed by William Levitt beginning in 1951 as a suburb of Philadelphia . The promise of their own single @-@ family home on their own land , together with a free college education and low @-@ interest loans given to returning soldiers to purchase homes under the G.I. Bill , drove demand for new homes to an unprecedented level . Additionally , 4 million babies were born every year during the 1950s . By the end of the baby boom era in 1964 , almost 77 million " baby boomers " had been born , fueling the need for more suburban housing , and automobiles to commute them to and from the city centers for work and shopping . 

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 The rise of immigration near the turn of the 20th century left major portions of Manhattan , especially the Lower East Side , densely packed with recent arrivals , crammed into unhealthy and unsanitary housing . Tenements were usually five @-@ stories high , constructed on the then @-@ typical 25x100 lots , with " cockroach landlords " exploiting the new immigrants . By 1929 , stricter fire codes and the increased use of elevators in residential buildings , were the impetus behind a new housing code that effectively ended the tenement as a form of new construction , though many tenement buildings survive today on the East Side of the borough . 
