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Especially during the hot summer months, some of us might daydream about packing up and relocating to a small tropical island somewhere in the Pacific. From a development perspective, however, small island states face unique challenges—most obviously from rising sea levels, but also from the economic dynamics created by their small size and isolation. My guest this week is Satish Chand, a visiting fellow here at the Center for Global Development and a native of Fiji. On this week’s Wonkcast, we discuss a range of issues that affect small island nations, as well as Satish’s research on the effects of migration on human capital in Fiji.

Surprisingly, Satish tells me that nations surrounded by ocean share many of the problems of small landlocked countries. “Being landlocked impedes trade and communication just as much as being out there in the ocean,” Satish explains. Small populations and limited available land also make it difficult for these states to take advantage of economies of scale in providing basic services to their citizens.

As the BP well in the Gulf of Mexico continues to spew thousands of barrels of oil each day, media attention has been focused on the toll on nearby economies and ecosystems and on the U.S. political response. On this edition of the Global Prosperity Wonkcast, we look beyond the Gulf of Mexico to explore what implications America’s biggest environmental disaster might hold for the new offshore oil boom getting underway in Africa.

My guests are Vijaya Ramachandran and Todd Moss, both senior fellows here at the Center for Global Development.

With high deficits across the developed world, aid budgets are tight and likely to remain so. However, a simple change in how the World Bank organizes its lending could free up an extra $7.5 billion for the world’s poorest countries over the next three years. My guest on this Wonkcast is Ben Leo, a research fellow here at the Center for Global Development and the author of a new working paper that sets forth this straightforward and potentially incredibly impactful proposal.

To understand how Ben’s idea would work, it’s necessary to know that the World Bank has two lending arms: the International Development Association (IDA) lends money to very poor countries at highly concessional rates; the International Bank for Reconstruction and Development (IBRD), borrows on international capital markets and re-lends to relatively better-off countries, at somewhat higher rates, leveraging the Bank’s AAA credit rating to offer better terms than those countries could obtain on their own. Some countries, such as India and Vietnam, are so-called “IDA blend” – they get some loans from IDA and some from the IBRD.

Even as the cost of treating HIV/AIDS has fallen dramatically, the number of people newly infected has remained high. What can be done to reverse this trend and finally defeat this disease? This week on the Wonkcast, I’m joined by Mead Over, a senior fellow here at the Center for Global Development and perhaps the world’s leading expert on the economics of HIV/AIDS. He has recently published two major essays, which introduce the concept of the “AIDS transition”—the point in time where the number of people living with the disease begins to fall. He argues persuasively that to reach this point, international donors must greatly strengthen incentives for effective prevention.

“We should be very proud of the accomplishment in bringing down the numbers of AIDS deaths,” says Mead. “But the number of new infections… has not fallen enough. And so the result is we have a new take-off in the numbers of people living with AIDS.” Since 1997, he says, the number of HIV-infected people has increased by 50%, rising from around 22 million in 1997 to 33 million today.

This week, I'm joined on the Global Prosperity Wonkcast by Chris Blattman, assistant professor of political science and economics at Yale University and a non-resident fellow here at the Center for Global Development. Much of Chris' research tries to understand what happens after child soldiers return home, with the goal of designing programs that can better reintegrate former combatants into society. He also explores the logic that explains why guerrilla armies in many conflicts use child soldiers in the first place.

Chris has studied extensively the case of the Lord's Resistance Army, a Uganda guerrilla group responsible for some 60-70,000 abductions. Outsiders often despair over the large number of these former child soldiers, calling them a "ticking time bomb".

"That's a very pessimistic view, and it's the dominant view," Chris tells me. "And from what we can see, it's simply not true."

Can a few brave souls make a difference in the fight against corruption? My guest on the Global Prosperity Wonkcast this week is Nuhu Ribadu, the former head of Nigeria’s Economic and Financial Crimes Commission or EFCC and a visiting fellow here at the Center for Global Development. Nuhu is working on a manuscript that tells the story of his four years (2003-2007) at the helm of the EFCC during which he won more than 275 convictions and recovered an astonishing $5 billion in stolen assets.

Nuhu explains the circumstances that led Nigeria to create the EFCC, starting with the 1999 democratic elections, the first in 16 years. The new president, Olusegun Obasanjo, had campaigned on an anti-corruption platform. The September 11, 2001 terrorist attacks provided an additional push, heightening international awareness of the illicit financial flows that enable terrorist networks and political corruption alike. As a result, in late 2001 Nigeria found itself on an international blacklist of countries that enable money laundering, a list maintained by the independent Financial Action Task Force. It took nearly two years for Nigerian officials to realize they were on this black list and take action to get off of it. When they finally acted, they created the EFCC, a new office charged with cracking down on money laundering.

Has technology boosted the ability of citizens in African countries to influence their governments? This week, I'm joined by Rakesh Rajani, founder and head of Twaweza, an initiative that promotes transparency and accountability in Tanzania and other countries in East Africa. His organization has made good use of both new and old technologies—cellphones, TV, and radio broadcasts—to expand the ability of citizens to access government information and hold their leaders accountable.

Rakesh tells me that cellphone use has exploded in the last decade in Tanzania, rising from perhaps 200,000 users to over 14 million today. Except for the most remote areas of the country, he says, just about everyone can access a mobile phone. That new connectivity, Rakesh explains, has opened new channels for reducing corruption in government.

I'm joined this week by Ayah Mahgoub, a program coordinator here at the Center for Global Development who works on issues related to the effectiveness of foreign aid. Along with Nancy Birdsall and Bill Savedoff, Ayah is working on designing a new form of development assistance called Cash on Delivery Aid that would pay for progress on specific development outcomes.

Nancy summed up the basic idea of the Cash on Delivery approach on a Wonkcast last month—read that post or go here for a short introduction to the idea of COD Aid. While discussions are underway to develop COD aid mechanisms for a number of sectors (including water and health), the initial application is in education. In this sector, a Cash on Delivery contract would pay recipient governments a fixed amount for each additional student who completes primary school and take a standardized test. Ayah is helping to match aid donors and recipient governments who are interested in supporting a pilot of this innovative approach. I asked Ayah to tell us about the countries where the first COD Aid programs might happen: Malawi, Ethiopia, and Liberia.