 In addition to this, there are different ways of treating past (and current) emissions. Some, for example, hold that countries have emission rights and that a country’s past emissions should be debited from its quota (Neumayer 2000: esp. 186). Others suggest disregarding past emissions and favour applying the equal per capita emissions approach to the remaining budget (Singer 2002: 43–44; Vanderheiden 2008: 229–230). Still others argue that we should phase in the equal per capita view gradually over time, and hence high emitters now will have more-than-equal emission rights at the start of the transition period, with their share decreasing until it reaches equality (A. Meyer 2000).