Promoting effective competition in developing countries means getting tougher on cartels in the OECD area, and compensating customers internationally. Through a new competition fund, the OECD could play a lead role in making sure poorer countries get a fairer deal.

Well done on a clever choice of photo for “Africa: An emerging markets frontier” (No 263, October 2007). Africa is certainly in a better state than it was and, as you point out, all that new investment coming from around the globe is encouraging. The test is how long it will all last.

You rightly point out that “the supply of medical staff reflects global movements of labour” (No 262, Databank, July 2007). But many of us might disagree with your upbeat headline: “Healthy immigration”. In a report published in 2005, the Royal African Society argues that while recruitment of African medical professionals has shored up western health services, it has left the health sector in sending countries facing permanent crisis or even complete collapse.

Prof Vaclav Smil’s lucid and measured thinking is correct in that we must be realistic about renewable energy’s future (No 258/259, December 2006). But I wonder if he is not being too dismissive of solar energy.

The “pay-as-you-go” government pension system common to many countries, as you point out, will not be financially sustainable, the result of the rapid ageing of societies in developed countries (No 262, July 2007). As your graph shows, the only way to fund the pensions deficit will be through one or all of the following measures: a large tax increase, a substantial decrease in benefits or a significant raise in the retirement age.

As you point out, a key cause of the problems of the Doha trade round has been a lack of understanding among voters and opinion makers in the developed world on the importance of farm trade liberalisation (No 257, October 2006).

The figures you give for the dramatic fall in support for economic infrastructure and agriculture as part of total bilateral ODA between 1995/96 to 2002/2003 are sobering (No. 261, May 2007). There is increased emphasis on these two areas by development agencies, but it will be important to see if resource commitments actually follow–particularly for aid and investments in agriculture. But didn’t NEPAD members at Maputo commit to invest 10% of GDP in agriculture, not to increase investments by 10%?

Your energy focus covers the renewable question well (No. 258-259, December 2006). But what if the renewable promise became a broken one? It might, if mindsets don’t change. Thanks to technological advances and climate change fears, energy has pushed to the front stage again. Governments have been slower to move. Also, as Vaclav Smil’s article shows, the current energy system is based on high-energy density sources, like oil and coal, supplying nationwide energy grids (“21st century energy: Some sobering thoughts”).