and positive under 1% statistical level, indicating
that migrant workers’ subjective well-being firstly
descend and then rise up with age in our country;
Men’s regression coefficient is dramatically
positive, showing that men are happier than women;
Results in marital status show that those who have
been married are significantly happier than those
who haven’t got married; the unemployed migrant
workers dramatically unhappier than the employed.
Whether there are any children in the family makes
no difference to migrant workers’ subjective well-
being; Under 5% statistical level, the regression
coefficient of education year is significant negative,
indicating that longer they are educated, lower their
happiness is. In terms of family: Family debts make
weak but significant positive effect to subjective
well-being. The effects labor income makes are
positive, but the marginal effects brought by
remittance are more than those brought by income.
Furthermore, the forth, fifth and sixth lines all
adopt Ologit model, their results are similar to those
using Tobit, remittance variable is still significant.
Table 3: Empirical results of how remittances affect
subjective well-being.
Var (1) (2) (3) (4) (5) (6) (7) (8) (9)
Tobit Tobit Tobit OLogit OLogit OLogit IVTobit 1st stage 2SLS
Remit -0.000**-0.000** -0.000** -0.017 -0.017
tance
(0.000) (0.000) (0.000)(0.000) (0.013) (0.012)
Income 0.000*** 0.000*** 0.000** 0.000** 0.000 -0.003 0.000
(0.000) (0.000) (0.000) (0.000) (0.000) (0.003) (0.000)
Family 0.000** 0.000** 0.000* 0.000* 0.000* 0.013* 0.000*
debts
(0.000) (0.000) (0.000) (0.000) (0.000)(0.008) (0.000)
Age -0.040*** -0.040*** -0.018 -0.019 0.039 6.725 0.047
(0.011) (0.011) (0.019) (0.019) (0.130)(4.829)(0.129)
Square 0.001*** 0.001*** 0.000 0.000 -0.001 -0.092 -0.001
of age (0.000) (0.000) (0.000) (0.000) (0.002)(0.0621) (0.002)
Gender 1.431*** 1.428*** 0.524*** 0.523*** 1.568*** 7.805 1.511***
(0.181) (0.181) (0.064) (0.064) (0.335) (15.679) (0.323)
Quantity -0.111 -0.120 -0.048 -0.051 0.126 2.529 0.119
of children
(0.159) (0.159) (0.055) (0.055) (0.163) (7.852) (0.157)
Educati -0.050** -0.050** -0.013* -0.012 -0.133* -5.135*** -0.129*
on year
(0.022) (0.022) (0.008)(0.008) (0.077) (1.878) (0.074)
Employ 1.578*** 1.626*** 0.439** 0.457** -0.383 -116.758*** -0.372
Status
(0.52) (0.519) (0.192)(0.191) (1.753) (44.776)(1.693)
Marital 0.402* 0.394* 0.187* 0.188* 0.555 4.085 0.505
status
(0.225) (0.225) (0.101) (0.101) (0.451) (21.964)(0.436)
Inter 28.48** -27.25*** 27.08*** 33.05*** 21.78*** 32.64***
cept
(0.104) (0.622) (0.616) (4.506) (91.074)(4.352)
R2 0.000 0.005 0.005 0.000 0.006 0.005 0.007 0.000
AR 0.004***
Wald test 35.43*** 34.47***
N 3368 3368 3368 3368 3368 3368 3297 3297 3297
Annotation: ①* 、 ** 、 ***respectively show
significant level of 10%, 5% and 1%②Wald test
indicates exogenous exemplary inspection.
3.2 The Endogenous Processing
Accessing equation (1) by using Tobit model will
lead to key parameter’s biased estimation. In order
to amend endogenous errors, we decide to use
instrumental variable LM, it shows the total amount
of months migrant workers going out for work and
business last year. It will straightly affect the
frequency they remit and then affect their amount of
remittances, but make no difference to their
subjective well-being.
Using this instrumental variable, we adopt the
IVTobit model, its results are in Table3, Line 7; at
the same time, we choose 2SLS accessing model and
its report of results is in Table3, line 8 and line 9.
Line 7 and line 9 in Table3 show that all Wald
exogenous exemplary inspections have rejected to
use remittance as exogenous variable ’ s original
assumption, that is to say the remittance is internal
variable. Line 8 in Table3 shows that robustness
examinations of weak instrumental variable have
turned the original assumption down and indicates
that there’s no problem about weak instrumental
variable. Therefore, there is neither problem of weak
instrumental variable nor endogenous problem in
instrumental variable we use. It turns out to be that
remittance still performs significantly in subjective
well-being.
3.3 Robustness Problems
In order to examine the reliability of these results,
we conduct following robustness examinations.
Firstly, we use alternative instrumental variables of
migrant workers’ remittances to make regression
for benchmark model again; Secondly, we consider
whether bringing into new variables will make any
difference to our results. The examination results
will be sorted out and then reported in Table4.
(1)Seeking for alternative instrumental variables
for migrant workers’ remittances. In the robustness
examination, we respectively adopt regression of
average remittance of migrant workers, per-capita
remittance and a dummy variable of whether there is
a remittance as alternative variable for migrant
workers ’ remittance. In Table4, when we
respectively use remittance, average remittance and
relative remittance to perform regression, the rise of
relative remittance affects migrant workers’
ISME 2016 - Information Science and Management Engineering IV
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