Nominal GDP per capita does not, however, reflect differences in the cost of living and the inflation rates of the countries; therefore using a basis of GDP at purchasing power parity (PPP) is arguably more useful when comparing differences in living standards between nations.
lag verb. âº [I or T] to not make as much âprogress as other âpeople or things: lag behind sb/sth Business âleaders in the UK still lag behind their âEuropean âcounterparts in âforeign âlanguage âskills.lag well/far behind As usual we lag far behind the rest of the âworld in this matter.
Lagging phase refers to a wave that occurs behind another wave of the same frequency. When two signals differ in phase by -90 or +90 degrees, they are said to be in phase quadrature . When two waves differ in phase by 180 degrees (-180 is technically the same as +180), the waves are said to be in phase opposition .