Complex Contagions and the Diffusion of Innovations: Evidence from a Small-N Study

The recent literature on “complex contagions” challenges Granovetter’s classic hypothesis on the strength of weak ties and argues that, when the actors’ choice requires reinforcement from several sources, it is the structure of strong ties that really matters to sustain rapid and wide diffusion. The paper contributes to this debate by reporting on a small-N study that relies on a unique combination of ethnographic data, social network analysis, and computational models. In particular, we investigate two rural populations of Indian and Kenyan potters who have to decide whether to adopt new, objectively more efficient and economically more attractive, technical/stylistic options. Qualitative field data show that religious sub-communities within the Indian and Kenyan populations exhibit markedly different diffusion rates and speed over the last thirty years. To account for these differences, we first analyze empirically observed kinship networks and advice networks, and, then, we recreate the actual aggregate diffusion curves through a series of empirically calibrated agent-based simulations. Combining the two methods, we show that, while single exposure through heterophilious weak ties were sufficient to initiate the diffusion process, large bridges made of strong ties can in fact lead to faster or slower diffusion depending on the type of signals circulating in the network. We conclude that, even in presence of “complex contagions,” dense local ties cannot be regarded as a sufficient condition for faster diffusion.     

Medieval phases of settlement at Benabbio castle,Apennine mountains,Italy: evidence from Ground Penetrating Radar survey

The lack of written sources for many of the medieval castles in the northern Apennines (Italy) makes it difficult to completely establish the most ancient historical phases of these settlements. The church of San Michele belongs to an abandoned fortified settlement of the Castle of Benabbio, in the mountains surrounding Lucca. Thanks to an epigraph still visible on the façade, the church foundation is dated back to AD 1218. However, several archaeological findings at the settlement seem to suggest stages of encastlement that are older than the church foundation.     

Challenging the Australian Government Approach Towards Expatriate Voting: The Case of Italy

In 1999 the Australian government dropped its objections to the Italian legislation that contemplated postal voting and parliamentary representation for its Italian citizens resident abroad. This was a significant turning point for the Australian government approach on the question of voting rights for expatriate communities in Australia voting in their homeland elections. Based on undisclosed government sources and interviews with former Australian diplomatic and government officials, this paper will recall and examine the Australian government's reaction to the Italian political debates leading up to, and eventual passage of, the Italian expatriate vote legislation.     

Learning policy—the contextual curtain and conceptual barriers

Many European states are now giving attention to strategic planning as a means of coordinating and democratizing local government. The UK government is not alone in seeing some form of ‘community planning’ as a means of promoting closer sectoral integration in policy‐making and service delivery while also encouraging public participation. This suggests scope for comparative research to inform lesson drawing, especially from Norway, which has been rolling out kommuneplan at the municipality level since 1985. Cross‐national lesson‐drawing is hazardous, however, given the different legal, political and cultural traditions which make policies ‘work’ in particular local settings. In this article these difficulties are acknowledged and ethnographic research is used to explore further problems in lesson‐drawing, especially the very different ways in which concepts of participation and integration are given meaning in particular national contexts. Through comparative ethnographies of community planning processes in Asker Municipality, Norway, and South Lanarkshire Council, Scotland, remarkable similarities are revealed in the language and objectives of the planning documents in each setting, but show that this belies important differences in the relations between administrative and political domains, in the governing role of plan statements, and in the underlying theories of democracy.