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Odd–even rationing : ウィキペディア英語版 | Odd–even rationing Odd–even rationing is a method of rationing in which access to some resource is restricted to half the population on any given day. In a common example, private vehicles may be allowed to drive, park, or purchase gasoline on alternating days, according to whether the last digit in their license plate is even or odd. Similarly, during a drought, houses can be restricted from using water outdoors according to the parity of the house number. Typically a day is "odd" or "even" depending on the day of the month. An issue with this approach is that two "odd" days in a row occur whenever a month ends on an odd-numbered day.〔(Editorials on file (1979) Volume 10, Part 1 )〕 Sometimes odd or even may be based on day of the week, with Sundays excluded or included for everyone. ==Effectiveness== The efficacy of odd–even rationing is debated. In a case like gasoline, it does not actually reduce consumption, since people prevented from filling up one day will just fill up the day before, and vice versa; the total number of people in line on each day is unchanged.〔(Odd Even Gasoline Rationing by Jim Johnston on November 14, 2012 )〕〔(Odd scheme Odd Scheme by Don Boudreaux on November 12, 2012 )〕 Some propose it has psychological effects like reducing panic buying,〔(Why Gas Lines Are Like Bank Runs & Why Odd/Even Gas Rationing Actually Works by Barry Ritholtz – November 13th, 2012, 7:15AM )〕 discouraging people from making small purchases on a daily basis,〔(ET Fuel Rationing Is Hard to Gauge by CARL BIALIK November 16, 2012, 6:53 p.m. )〕 or emphasizing the shortage and further discouraging unnecessary trips.〔(November 17, 2012, 3:46 AM Does Odd–Even Rationing Work? Carl Bialik )〕 Rationing access, rather than gasoline, based on number plate parity can reduce traffic congestion. In some areas, wealthier people purposely own two cars with opposite-parity number plates, to circumvent any restrictions. Vanity plates which do not contain any digits may be arbitrarily classed as odd or even.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Odd–even rationing」の詳細全文を読む
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