This paper sheds light on the links between media and political polarization by looking at the introduction of broadcast TV in the US. We provide causal evidence that broadcast TV decreased the ideological extremism of US representatives. We then show that exposure to radio was associated with decreased polarization. We interpret this result using a simple framework that identifies two channels linking media environment to politicians' incentives to polarize. First, the ideology effect: changes in the media environment may affect the distribution of citizens' ideological views, with politicians moving their positions accordingly. Second, the motivation effect: the media may affect citizens' political motivation, changing the ideological composition of the electorate and thereby impacting elite polarization while mass polarization is unchanged. The evidence on polarization and turnout is consistent with a prevalence of the ideology effect in the case of TV, as both of them decreased. Increased turnout associated with radio exposure is in turn consistent with a role for the motivation effect.
In December 2010, the self-immolation of a Tunisian fruit vendor sparked what has come to be termed the “Arab Spring.” What first appeared as an isolated act of protest against local authorities quickly gained broader significance, as it was followed by a series of demonstrations that has shaken the grip of autocratic regimes across the Arab world. A year later, three longstanding dictators - Zine El Abidine Ben Ali of Tunisia, Hosni Mubarak of Egypt, and Muammar el-Qaddafi of Libya - have been ousted, after varying degrees of violence. Syria, Yemen, and Bahrain have all witnessed extensive turmoil, raising serious questions about the ahrain have all witnessed extensive turmoil, raising serious questions about the
legitimacy and survival of their rulers. Elsewhere, the political leaders of Morocco, Algeria, and Jordan have also been pressured into enacting reforms to try to assuage public demands.
We investigate how the link between individual schooling and political participation is affected by country characteristics. Using individual survey data, we ﬁnd that political participation is more responsive to schooling in land-abundant countries and less responsive in human capital - abundant countries, even while controlling for country political institutions and cultural attitudes. We ﬁnd related evidence that political participation is less responsive to schooling in countries with a higher skill premium, as well as within countries for individuals in skilled occupations. The evidence motivates a theoretical explanation in which patterns of political participation are inﬂuenced by the opportunity cost of engaging in political rather than production activities.