# Joint research from Professor Bryan Bollinger addressing peer effects in the diffusion of solar panels is spotlighted

1 Faculty News August 19, 2020 ![The New York Times Logo](/sites/default/files/styles/246w/public/assets/images/uat_027320.jpg?itok=W8xBr66g)>

Excerpt from [The New York Times](https://www.nytimes.com/2020/08/19/business/behavioral-contagion-carbon-tax.html) -- "According to a 2012 study by the economists [Bryan Bollinger](https://www.stern.nyu.edu/faculty/bio/bryan-bollinger) and Kenneth Gillingham, a carbon tax that induced a family to install solar panels could be expected to stimulate a neighbor’s copycat installation within four months, on average. Let another four months pass, and each of these two will have spawned additional installations of their own, for a total of four."

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