Margaret Kyle, Heidi Williams, 22 May 2017

Despite higher per capita healthcare spending, US health outcomes compare poorly with other developed nations. One potential reason is that the US healthcare system creates incentives that promote the faster adoption of medical technologies with minimal benefits. This column tests this claim using data on the quality and diffusion of new pharmaceuticals in the US and four other countries. The results suggest that compared to Australia, Canada, Switzerland, and the UK, low-quality drugs diffuse more quickly in the US relative to high-quality drugs.

Yuichi Ikeda, Hideaki Aoyama, Hiroshi Iyetomi, Takayuki Mizuno, Takaaki Ohnishi, Sakamoto Yohei , Tsutomu Watanabe, 22 July 2016

Econophysics is an emerging field applying theories and methods from physics to economic problems and data. This column explores the collective motions of trade and the effects of trade liberalisation, using global data from the past two decades. Econophysics methods reveal how business cycles synchronise, and how economic risk propagates throughout the global economic network. The results also highlight inherent problems of structural controllability that are induced during economic crises.

Jeremiah Dittmar, Skipper Seabold, 19 August 2015

Internet-based communications technologies appear to be integral to the diffusion of social movements today. This column looks back at the Protestant Reformation – the first mass movement to use the new technology of the printing press to drive social change. It argues that diffusion of the Reformation was not driven by technology alone. Competition and openness in the media were also crucial, and delivered their biggest effects in cities where political freedom was most limited.

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