links for 2011-07-25

• This Is Considered Punishment? - Joe Nocera
• UCSB scholars study the evolution of human generosity - EurekAlert
• Help-Wanted Ads Exclude the Long-Term Jobless - NYTimes.com
• Scientists discover tipping point for the spread of ideas - EurekAlert
• Maximum Likelihod Estimation is Invariably Good! - Dave Giles
• The Vanishing U.S.-E.U. Employment Gap - Liberty Street
• Did global imbalances cause the financial crisis?- Vox EU
• Social explanation and causal mechanisms - Dan Little
• Abraham Lincoln on the Debt Ceiling Crisis - Paul Krugman
• The Perverse Politics of Financial Crisis - Luigi Zingales
• The Future of Economic Growth - Dani Rodrik
• Bad belt-tightening metaphors - Richard Green
• Washington is About to Make the Jobs Crisis Worse - Robert Reich
• Third party hype: Thomas Friedman redux - Brendan Nyhan