The experimental design employs real-world institutional features; including stochastic demand, permit banking, inter-temporal (multi-round) dynamics, a tightening cap, and resale.
A tightening cap would drive allowance costs higher, making the cheaper offsets increasingly useful, some legislators believe.
They could rebuff this foreign capital, by tightening caps, regulations and other restrictions on foreign investment.
Tightening caps provides a highly cost effective way of meeting the higher target.
Nevertheless some oppose tightening caps in a recession for fear that it will lead to demands for caps to be loosened in a period of economic growth.
The purpose of the laws introducing caps is to deliver an environmental outcome – tightening caps is completely in line with that objective while loosening them is not.
Even before questions arose over the exports to Japan in late September, China had been tightening caps on rare earth exports for five years.
The price has fallen because of the recession and because European governments have lobbied against tightening caps on emissions.
Inspection and maintenance programs and the On-Board Diagnostic (OBD) system will detect some of these deficiencies, however, even properly tightened caps will emit NMHCs due to permeation, diffusion, cracks and gaps in seals, and failures of pressure-relief mechanisms.
In fact, Granik said, the league "has been on a quest" since 1984, when the first soft-cap system was adopted, "to tighten the cap as much as possible".
