@TechReport{iza:izadps:dp6446,
            	author={Markussen, Simen and Røed, Knut},
            	title={Social Insurance Networks},
            	year={2012},
	month={Mar},
            	institution={Institute of Labor Economics (IZA)},
            	address={Bonn},
            	type={IZA Discussion Paper},
            	number={6446},
            	url={https://www.iza.org/publications/dp6446},
	abstract={Based on administrative panel data from Norway, we examine how social insurance dependency spreads within neighborhoods, families, ethnic minorities, and among former schoolmates. We use a fixed effects methodology that accounts for endogenous group formation, contextual interactions, and time-constant as well as time-varying confounders. We report evidence that social insurance dependency is contagious. The estimated network effects are both quantitatively and statistically significant, and they rise rapidly with "relational closeness" in a way that establishes endogenous social interaction as a central causal mechanism. Social interactions do not cross ethnic borders.},
	keywords={peer effects;social interaction;social multiplier;work norms},
            }