to hear Prof. Chang on "What is Economics? A User's Guide," 26 min from 5/23/2014, click on
https://www.youtube.com/watch?feature=player_embedded&v=yZAfLIKrp9A#t=0
In his talk, Cambridge economist Ha-Joon Chang provides the fundamental tools that every responsible citizen needs to understand – and address – our current economic woes.
The talk was chaired by Guardian columnist Zoe Williams and draws on Ha-Joon Chang’s latest book: Economics: The User’s Guide: A Pelican Introduction, in which he explains how the global economy works, and why anyone can understand the dismal science. Unlike many economists who claim there is only one way of ‘doing economics’, he introduces readers to a wide range of economic theories, from classical to Keynesian, revealing how they all have their strengths, weaknesses and blind spots.
more at www.nextnewdeal.net, www.foreffectivegov.org, www.therealnews.com, www.steadystate.org, www.worklessparty.org, www.onthecommons.org, www.progressive-economics.ca, www.freembtranslations.net and www.social-europe.eu
I haven't seen anyone comment on the differences.
I think Chang sees trade and industrial policy as the point to focus on. So maybe we can say he sees wealth come from trade.
Piketty is concerned with capital, sees it as the source of wealth. He's almost a Henry Georgist, except about money rather than land.
Piketty is being presented as a kind of new-Marx, but Marx thought that labor was the source of wealth. That's why he advocated for an income tax.