alex piquero    american pastime    arrival of mobile phones    book chapter    broken windows    careful reviews    cecilia machado    cellphone-ownership rates    columbia university economist    commonsense argument    components of the long-term decline    contributing factor    crime    crime rates    crime trends    criminologist maria tcherni-buzzeo    criminologists erin orrick    dark energy    de-escalation of the gang turf wars    decline    different countries    different explanations    director of the brennan center    drug sales.lena edlund    economists steven levitt    empirical research    entire world    environmental lead exposure    estimates of homicide rates    fall of crime    falling crime rates    federal communications commission data    football field    little evidence    maria tcherni-buzzeo    new national bureau of economic research    new theory    number of unwanted pregnancies    overall decline    paper    paper claims    property crime    recent research    recent years    social silver lining    sorts of societal problems    substantial initial results    temporary increase    uniform crime reports    united states