Free-riding is at the core of environmental problems. If a climate coalition reduces its emissions, world prices change and nonparticipants typically emit more; they may also extract the dirtiest type of fossil fuel and invest too little in green technology. The coalition's second-best policy...

The G-20 was created to deal with the global financial and economic crisis of 2008. G-20 leaders were successful – the crisis was contained. Should the G-20 leaders move on to deal with the most difficult and hitherto intractable global environmental policy issues? The United Nations has not...

The current debate on trade liberalization is accompanied by an increased concern about environmental and food safety issues leading to frictions of different country groups under the World Trade Organization (WTO). This discussion paper aims at shedding more light on some of the issues in the...