More Moral Portfolio Theory: Ethical Consumption Edition

From Slate:

But new research by Nina Mazar and Chen-Bo Zhong at the University of Toronto levels an even graver charge: that virtuous shopping can actually lead to immoral behavior. In their study (described in a paper now in press at Psychological Science), subjects who made simulated eco-friendly purchases ended up less likely to exhibit altruism in a laboratory game and more likely to cheat and steal.

In an experiment, participants were randomly assigned to select items they wanted to buy in one of two online stores. One store sold predominantly green products, the other mostly conventional items. Then, in a supposedly unrelated game, all of the participants were allocated $6, to share as they saw fit with an anonymous (and unbeknownst to them, imaginary) recipient. Subjects who had chosen items from the green store coughed up less money, on average, than their counterparts. In a second experiment, participants were again assigned to shop in either a green or conventional store. Then they performed a computer task that involved earning small sums of cash. The setup offered the opportunity to cheat and steal with impunity. The eco-shoppers were more likely to do both.

Also, I would argue that voting is a type of "ethical consumption."