名義GDP和實質GDP

(nominal gdp)名義gdp-通脹率(inflation rate)=實質gdp(real gdp)
最主要取決於,經濟是處於通宿(deflation)或通脹(inflation),如果處於通脹,實質的gdp所帶來的收入或購買力會較名義低,因通脹降低了收入或購買力,所以名義gdp減去通脹,便可計出真正的gdp(購買力),通脹的時候,名義的gdp高於實質的gdp.

反之,當經濟處於通宿,因物價下降了,實質的購買力過於名義,所以實質gdp較名義gdp高!在算式表逹是
名義gdp-(-通脹率)=實質gdp,
名義gdp+通長率=實質gdp,
實質gdp>名義gdp.
死背是很難的,最重要是明白,通脹與實質gdp的關係,通脹上升,實質收入或購買力下降了!反之亦然!

Nominal GDP is the day-to-day GDP you often see, which is reported without adjusment for inflation rate of an economy.

Real GDP is the nominal GDP after adjusted for the impact of inflation.
Their relationship is: real GDP + inflation = nominal GDP, or
r + i = m

Most often inflation rate i will be +ve ; if the inflation rate is -ve, we say that there is a "deflation" instead of negative inflation, which is rare but happened in Hong Kong in previous recent years.

To answer your question, nominal GDP > real GDP if there is an inflation;
while during a deflation, real GDP will be > nominal GDP.

2007-01-21 14:53:19 補充：
3rd paragraph should read: Most often inflation rate i will be positive; if the inflation rate is negative, we say that there is a DEFLATION, instead of negative inflation.