# Table 2 Description of key variables

Description of key variables
Wu $w u it = average wage index in top three units i , t CPI index i , t$
where, average wage index in top three units i,t =
$average wage in top three units i , t average wage in top three units i , t = 0$
and, $CPI index i , t = CPI i , t CPI i , t = 0$
$wu i ¯ = ∑ t = 0 9 wu i , t (∗)$
i = 1…18,t = 0…9
wr $w r i , t = average gross rural income index i , t CPI index i , t$
where, average gross rural income i,t =
$gross rural primary industry output i , t rural primary industry labor force$
and, average gross rural income index i,t =
$average gross rural income i , t average gross rural income i , t = 0$
and, $CPI index i , t = CPI i , t CPI i , t = 0$
$wr i ¯ = ∑ t = 0 9 wr i , t (∗)$
i = 1…18,t = 0…9
UH rate urban hukou rate$i , t = urban hukou population i , t city population i , t$
$urban hukou rate i ¯ = ∑ t = 0 9 urban hukou rate i , t (∗)$
i = 1…18,t = 0…9
Lmar-rate Late marriage rate i,t is the ratio of the number of
females who were at least 23 years old at
marriage to the total number of first marriages.
K/P (K/P)$i , t = capital stock i , t city population i , t ;$
capital stock i,t =K i,t =(1−δ)K i,t−1+F D I i,t ,
where δ is depreciation rate.
$δ= original K i , t = 1992 − net K i , t = 2 original K i , t = 2$
i = 1…18,t = 0…9
SFP number of single female i,t =
number of female i,t −number of married and child
bearing age i,t .
where, child bearing age is between 20–49 years old
i = 1…18,t = 0…9