Theory of capital resource of Ismail and Yussof (2010) shown that income is
formed by physical capital and human capital. Physical capital is acquired by
themselves or borrowing in the form of monetary or physical (physical is shown
in the form of assets, labor materials, means of production, etc.). Human capital
is gained through the labor accumulation, which is the skills and knowledge
accumulated during the learning and life experience. During creating value for
labor product, it cannot lack one of these two elements above; they complete
each other and indispensable in every human activity. Human capital is
involved in the operation, creation on the basis of physical capital and vice
versa. Thus, when considering the income of an individual, a family needs a
general assessment of the many factors that make up the value of income.
Therefore, to assess the income of poor households, it is necessary to assess
overall between the income and access of microcredit of households. Speeding
up income for poor households on the basis of increasing access to microcredit
for poor households.
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in some ASEAN countries is as follows:
10
In India, the standard is 2250 calories/person/day. In Bangladesh, the standard is
2100 calories/person/day.
In Indonesia: In the early 1980s, the consumption of calories was 2100
calories/person/day as a standard to determine the boundaries between rich and poor.
In China: In 1990, the consumption of calories was 2150 calories/person/day.
Industrialized countries in Europe: 2570 calories/person/day.
2.2.3. Poverty line of Vietnam
In the 1990s, the poverty line in Vietnam was defined as: households with income per
capita in rural and mountainous areas are from 45,000 VND/person/month (540,000
VND/person/year) downwards. In rural and delta areas, the households with average
income per capita was VND 70,000/person/month (840,000 VND/person/year). In
urban areas, the income per capita was 100,000 VND/person/month (1,200,000
VND/person/year). In 2006, the poverty line in rural areas was 200,000
VND/person/month and in urban areas was 260,000 VND/person/month. In the
period of 2011-2015, the poverty line was 500,000 VND/person/month (urban area)
and 400,000 VND/person/month (rural area)
2.3. Income
2.3.1. Concept
The General Statistics Office (GSO) (2011) defines that: Income is the total amount
of money that a person or family earned in a day, a week or a month, or more
specifically, all that a person earned when devoting the work force properly, so it is
called income. The monthly income per capita is calculated by dividing the total
income in year of the household by the number of household members and dividing
by 12 months.
11
2.3.2. Factors affecting income
The income of each individual is obtained from devoting the work force,
participating in labor activities. The contribution of labor force of each individual
brings income to each individual and family. That contribution brings economic
value to the family through daily, monthly or even annually income for the
household. Therefore, to create the valuable products, it requires a combination of
physical capital and human capital (Ismail and Yussof, 2010). The combination of
human capital and physical capital produces the labor value expressed by the added
value of income achieved. In human labor activities, these two inseparable factors as
follows.
- Relationship between financial capital and income
Capital is considered as a “lever” for the process of economic growth and
development, a stimulation of the process of expanding the scale of production,
implementation of economic projects and a contribution to increase the benefits,
create the momentum to the economic development process. When credit markets are
limited, the producing decision of a household depends on the price of market
efficiency, p, the characteristics of production and the characteristics of access to
credit shall be: q q( p q h K).
- Difference in income
The Neoclassical economists gave the theories: Human capital theory, income and
discrimination theory, production theory ... to explain the fundamental differences in
the income of individuals or households. Thus, the income is a multivariate function
depending on many different factors (Y =f (x1,x2,x3xn). Today, to analyze the
impact of factors on income, the function most commonly used in the analysis is the
Cobb-Daughlas function. The Cobb-Daughlas function has the form as follows:
Y = A.X1
α1
. X1
α2
. Xn
αn
.e
β
i
D+x
i
D
1
+λ
i
D
2
12
In which, Y is the income; A is the constant; Xi ( 1, )i n is the independent variable
affecting the dependent variable, Y, (income). The hypothesized independent
variables include credit, household characteristics, environmental factors and related
policies; e is factors other than factor Xi. In addition to the Cobb-Daughlas function,
there is also a semi-logarithm function: LN(Y)=β0+β1X1+β2X2++βnXn+ei (Mincer,
1974). Or multivariate linear function such as Y = β0 + β1X1 + β2X2 ++ βnXn + ei is
also widely used to estimate household income. From here, the study selects the
proposes the research model that is a regression model with the form of multi-
variable linear function to evaluate the impact of microcredit on income of poor
households as follows:
Y = β0 + β1X1 + β2X2 ++ βnXn + ei
2.3.3. Microcredit for income generating activities
Microcredit is needed to help poor households generate income (Krog, 2000).
Microcredit activities are used in developing countries and are highly effective in
poverty reduction, especially microcredit focuses on women customers in rural areas,
who have no accessibility capital resources from other financial institutions by
barriers on collateral and complex and cumbersome procedures, helping them to
create jobs and generate income (Mohanan, 2005).
2.4. Overview of access credit theory and barriers to access to credit
2.4.1. Asymmetric information in credit transaction and credit restriction
Asymmetric information occurs when the borrower understands their ability to repay
their loans while the lender does not know the borrower’s limitations. At the same
time, the borrower does not collect enough information about the loan or the lending
institutions. As a result, the borrower desires to borrow but cannot access to the loan;
and the lender does not know the customers who need the loan and bringing about the
13
consequences associated such as lending under the relationship, other complicated
and cumbersome procedures such as collaterals, guarantors, etc. But to meet these
conditions, most small and micro enterprises, poor households and low income
households cannot meet this condition.
2.4.2. Social capital, measurement of social capital and accessibility to credit
Until 1990, the American sociologist, James Coleman, gave the concept that social
capital as the characteristics in the everyday life, social networks, norms, and social
trust helps members in the society to work together effectively to achieve the
common goals. Bourdieu (1986) defines that social capital is derived from a direct
or indirect network, and is a durable network of interrelated relationships that are be
acquainted and recognize each other.
2.4.3. Characteristics of households, environmental factors and policies with
access to credit
Environmental factor with the distance on geographic gap, housing location and
characteristics of the living area, and the inadequacy of imperfect information make it
difficult for customers to access capital but they have to deal with difficulties to
access (Le Khuong Ninh, 2016, Nguyen Trong Hoai, 2005). People who want to
borrow cannot borrow and people who do not need the loans are more likely to get
access, thereby creating distorting motives when borrowing, to get the loans, people
who want to borrow seeks the way to get loans through the relationship, leading to
asymmetry in the supply and demand of credit in the financial market.
2.5. Overview of relevant research documents
14
Table 2.2. Summary table of relevant research results
Studies Object and scope
of study
Study method Study results
Microcredit with income
Quach Manh Hao
(2005)
Access to credit
and poverty
reduction in rural
Vietnam
With a cross-sectional dataset and
econometric model analysis through
the field survey data and the
population living standard survey
dataset VLSS 1992/1993 VLSS and
VLSS 1997/1998
Characteristics of household
affecting the access to credit and
income of poor households
Phan Dinh Khoi
(2012)
Living standards of
poor households in
the Mekong Delta
With a cross-sectional dataset for
survey in the Mekong Delta, the study
used the Propensity Score Matching
(PSM) technique and Instrumental
Variable (IV-PE) method in the
statistical analysis.
The impact of microcredit on income
has not been demonstrated clearly in
this study.
Phung Duc Tung et
al., (2013)
The work of
poverty reduction
in Ho Chi Minh
City in period of
2009-2013
Quantitative and qualitative method
with discontinuous regression model
in the study
Credit has impact on poverty
reduction
15
Dinh Phi Ho &
Dong Duc (2015)
Income of poor
households in
Vietnam in the
period of 2006-
2012
The study uses the Difference in
Differences (DID) method to assess
the impact of formal credit on
incomes and expenditures of farmer
households
Credit has officially impacted on
household incomes and expenditures.
Mohanan (2005) Study the
microcredit
activities in India
Qualitative research method Microcredit affects the income-
generating capacity of the poor,
empowering the women position.
Islam and Ahmed
(2010)
Study the
microcredit impact
on income
generating
activities of
customers
Quantitative method with statistical
analysis through SEM linear model
Microcredit affects the ability to do
business, create jobs, and build assets
of customers
Brown (2010) Study the
microcredit impact
on economic
development, job
creation and
income generation
Qualitative research method Microcredit offers borrowers the
opportunity to increase the labor
changes, diversify the livelihoods for
poor households
Ahmed et al., (2011) The role of
microcredit in
The qualitative analysis method with
the analysis of random interview data
Microcredit has no statistically
16
economic
development and
poverty reduction
from 20 people surveyed significant impact
Vitor et al., (2012) Microcredit with
income of women
in Central Ghana
Quantitative research method with
logit regression model, survey data
from 300 microcredit women
borrowers
Microcredit helps improve the
business skills and generate the
income of credit women borrowers.
Rykiye (2012) Study the
microcredit with
income change of
participating
members
The survey data analysis method from
2,036 observations of poor households
in Turkey
MICROCREDIT does not have an
impact on income, microcredit
borrowers as a normal need for
capital.
Ayen (2016) Study the
differences in
income of
microcredit
borrowers and non-
borrowers
Quantitative analysis method with
Propensity Score Matching (PSM)
from the female head of household
survey dataset at Jimma Zone
There is a difference in income
between borrowers and non-
borrowers
Accessibility to credit of households
Nguyen Quoc Oanh
and Pham Thi My
Study the accessibility Quantitative method with two-
step regression technique of
The monthly income and purpose of
borrowing affects accessibility to
17
Dung (2010) of formal credit Heckman (1999) through a
survey dataset of 116 households
formal credit of households.
Nguyen Phuong Le
and Nguyen Mau
Dung (2011)
Accessibility to formal
credit resources of
farmer households
Statistical method describes the
survey data from 60 households
interviewed based on the pre-set
questionnaire structure
The families with better economic
conditions can access higher credit
Phan Dinh Khoi
(2013)
Formal and informal
accessibility of farmers
in the Mekong Delta
Statistical analysis based on
survey data of 358 observation
samples from 919 rural
households
Income, employment of households
affect accessibility of households.
Tran Ai Kiet and
Huynh Trung Thoi
(2013)
Accessibility to formal
credit of farmers in An
Giang
Statistical analysis based on the
survey results of 150 farmer
households in the studied area
The values of assets, income, and
purpose of borrowing affect the
accessibility to formal credit of
farmer households.
AFD (2008) Accessibility to
microcredit of rural
households in Morocco
Causal analysis compares the
ability to borrow from
microcredit
Rural households may participate
more in microcredit loan when they
have stable income and are not
affected by seasonal factor.
Ibrhim and Bauer
(2013)
Access to microcredit
and the impact of the
microcredit approach to
Quantitative method with probit
regression technique
The characteristics of households
with members with good production
experience can access more
18
income of farmer
households
Masud and Islam
(2014)
Study the social capital
with access to credit of
households in
Bangladesh
Quantitative method with probit
regression technique through
random survey data from 153
households in Bangladesh
Social capital affects the access to
credit of households
Source: Summaries of the author
19
2.6. Theoretical foundations forming theoretical frameworks for study and
the establishment of research hypotheses
Theory of capital resource of Ismail and Yussof (2010) shown that income is
formed by physical capital and human capital. Physical capital is acquired by
themselves or borrowing in the form of monetary or physical (physical is shown
in the form of assets, labor materials, means of production, etc.). Human capital
is gained through the labor accumulation, which is the skills and knowledge
accumulated during the learning and life experience. During creating value for
labor product, it cannot lack one of these two elements above; they complete
each other and indispensable in every human activity. Human capital is
involved in the operation, creation on the basis of physical capital and vice
versa. Thus, when considering the income of an individual, a family needs a
general assessment of the many factors that make up the value of income.
Therefore, to assess the income of poor households, it is necessary to assess
overall between the income and access of microcredit of households. Speeding
up income for poor households on the basis of increasing access to microcredit
for poor households. With the above arguments, the thesis establishes two
research models and needs to be clarified in the study and theoretical
framework of the study formed as Figure 2.2.
Access
to MC
Income
Household
characteristics
Household
characteristics
Environmental
characteristics and
non-financial
activities
Environment and
preferential credit
policies of the locality
Social capital Microcredit
20
Figure 2.2. Theoretical framework for study
Source: The author proposes based on theory foundations and previous studies
Based on the above studies and based on the arguments of the research theory
foundations, the thesis formed hypothesis on income of households affected by
the following groups of hypothesis:
(1) Microcredit (group of hypothesis H1);
(2) Household characteristics (employment, number of labor generating jobs,
number of dependents in the family - group of hypothesis H2);
(3) Environmental characteristics and non-financial activities (group of
hypothesis H3)
Thus, it shown that, in order to promote the income increasing, it requires to
increase accessibility to microcredit for them. The thesis establishes a
Microcredit access model based on the foundations of the previous theory and
studies. The summarized groups of hypothesis are included:
(1) Social capital (group of hypothesis H4);
(2) Household characteristics (income, employment - group of hypothesis
H5);
(3) Environment and preferential credit policies of the locality (group of
hypothesis H6).
2.7. Gaps in research
Through examine summarily the relevant studies, most studies affirm that
microcredit offers many benefits to the poor such as increasing welfare,
increasing empowerment for women, generating income and improving the
living.
By this argument, it shown that the gaps should continue to be inherited and
clarified in the study are: (1) the study of the microcredit impact on the income
of poor households and to find out whether there is the income difference
between two groups of microcredit borrowers and non-borrowers? (2) the
21
specificity of the study area and (3) through the specificity of the area, to
determine the impact of microcredit through the value of income and to increase
the income and to increases the accessibility of microcredit for poor households,
what limitations affects the accessibility of microcredit of poor households?
From these gaps, the thesis continues to inherit previous studies and clarify gaps
in this research thesis.
2.8. Conclusions of Chapter 2
Chapter 2 summed up the relevant theoretical foundations, examined summarily
the studies in the country and abroad, and related studies; from that, the thesis
has developed a theoretical framework for study.
CHAPTER 3: STUDY METHODS
3.1. Study models
As presented in the arguments of study theory in Chapter 2, the study uses a
multivariate linear regression model with the hypothesis of microcredit impact
on the change of poor household income and the Binary Logistic regression on
the hypothesis of access factor to microcredit.
3.1.1. Microcredit model affects the income of poor households
The thesis uses a multivariate linear regression model to test the study
hypothesis. The analytical techniques through linear regression model, and the
model has the following form:
Y = β0 + β 1X1 + β 2X2+ ... + β 9X9 + e (3.1)
e: Residuals
β0: Vertical axis-cutting factor;
β1 to β9: Regression coefficient (correlation) of the variable X1,..X9.
22
Dependent variable, Y: Per capita income of the poor household, measured by
the total income of the household divided by the number of household members
(unit: million/year).
The model should go through the system with the following 6 tests:
Firstly, Test the partial correlation of the regression coefficients
Secondly, interpretation level of the model
Thirdly, suitability level of the model
Fourthly, phenomenon of collinearity
Fifthly, test the autocorrelation of residuals
Sixthly, Heteroskedasticity
3.1.2. Model of factors affecting access to microcredit
Logistic regression model:
∑ (3.2)
In which: Y: The dependent variable has two states (0,1); X1, X2Xi is the
value of independent variables; β0 is the estimated value of Y when the
variables X value 0; βk is the regression coefficients; u is residual.
According to Cox, D.R (1970), the general form of the Binary Logistic
regression model is as follows:
= β0 + β1X1 + β2X2 + βnXn (3.3.)
In which, P (Y=1)=P0: Probability of households access to microcredit; and
P(Y=0)=1-P: Probability of household not access to microcredit.
[
]
23
Take 00 =
; with 00: Odds Coefficient
LnO0 = β0 + β1X1 + β2X2 + β7X7 (3.5)
Therefore, Log of Odds coefficient is a linear function with independent variables
Xi ( 1,7)i . Equation (3.5) has the form of a logit function.
According to Agresti (2007), the model is approved the test system includes:
Firstly, the Wald test. Secondly, test the suitability of the model. Thirdly, test the
level of interpretation of the model.
3.1.3. Developing the basis for variable selection in study models
3.1.3.1. Microcredit model affecting income (M1)
Figure 3.1: Model of impact of microcredit on household income
Source: Propose to study based on theoretical framework and previous studies
MICROCREDIT
(hypothesis H1)
HOUSEHOLD
CHARACTERISTICS
(hypothesis H2)
Microcredit is expressed
through factors: loan scale,
interest rate, loan term and
loan purpose
Employment
Environmental risks
Number of dependents
Non-financial policies
ENVIRONMENTAL
CHARACTERISTICS AND
NON-FINANCIAL
SUPPORT POLICIES
(hypothesis H3)
INCOME
Labor scale
24
Selected variable
Hypothesis Basis for variable selection
[X1]. QM_VON
H1
Bateman’s Theory (2010) and Janvry’s Theory (1995)
Brown’s studies (2010); Islam and Ahmed (2010);
Vitor et al., (2012); Ibrahim and Bauer (2013),
Banerjee and Dulfo (2016); Alhassan and Akuduga
(2012). Vitor et al., (2012).
[X2]. TH_VAY
[X3]. L_SUAT
[X4]. MD_VAY
[X5].
S_PTHUOC
H2
Dinh Phi Ho and Dong Duc (2015)
[X6].
QM_LDONG
World Bank (2012); Ismail and Yussof’s Theory
(2010); Dinh Phi Ho and Dong Duc (2015)
[X7]. V_LAM
World Bank (2012); Ismail and Yussof’s Theory
(2010); Dinh Phi Ho and Dong Duc (2015)
[X8]. R_RO
H3
Janvry’s Theory (1995), Dinh Phi Ho and Dong Duc
(2015)
[X9]. CS_TPC
Manganhele (2010), Phung Duc Tung et al., (2013);
Banerjee and Dulfo (2016); Boamah and Alam (2016);
Nguyen Duc Nhat et al., (2013); Alhassan and
Akuduga (2012).
Source: Summarize from theory foundations and previous studies
3.1.3.2. Microcredit access model (MH2)
25
Figure 3.2. Microcredit access model
Table 3.2. Summarize the foundations for developing variables for the
microcredit access model
Selected variable
Hypothesis Basis for variable selection
[X1]. VON_XH
H4
Masud and Islam (2014); Putnam (1995); Baurm and
Ziersch (2003); Stone (2001); Kilpatrick (2002); Ajam
(2009); Lin et al., (20010); Okten (2004).
[X2].
TS_TGVXH
[X3]. V_LAM
H5
AFD (2008); Tran Ai Ket and Huynh Trung Thoi
(2013); Phan Dinh Khoi (2013).
[X4]. T_NHAP
Brown (2010); Armed et al., (2011); Vitor et al.,
(2012); Ibrahim and Bauer (2013) Mohannan (2005),
Phan Dinh Khoi (2013). Tran Ai Ket and Huynh Trung
Thoi (2013).
Household characteristics
(hypothesis H5):
Income, employment
Social capital (hypothesis H4):
Participating in social capital,
frequency of participating in social
capital
Environmental factors and
preferential credit policies of the
locality (hypothesis H6): The
housing location of the households,
living area and preferential policies
of the locality
Access to
microcre
dit
26
[X5].V_TRI
H6
Le Khuong Ninh (2016); Dinh Phi Ho (2012), Banerjee
and Dulfo (2016) and characteristics of the study area.
[X6]. K_VUC
World Bank (2012), Le Khuong Ninh (2016), Nguyen
Trong Hoai (2005). Phan Dinh Khoi (2013) and
characteristics of the study area
[X7]. CS_TC
Phung Duc Tung et al., (2012), Boamah and Alam
(2016); Nguyen Duc Nhat et al., (2013); Alhassan and
Akuduga (2012).
Source: Summarize proposals from study theory foundation and previous studies
3.2. Measurement of concepts in study models
Model 1: The impact model of microcredit on income change
Table 3.3: Measurement of variables in the model of microcredit impacts income
No.
Contents
Measurement
Sign
expectat
ion
I INDEPENDENT VARIABLES:
1 [X1]. QM_VON Representing the amount of loan (Unit: mil dong) +
2 [X2]. TH_VAY Term of loan use (unit: month) +
3 [X3]. MD_VAY Loan purpose +
4 [X4]. L_SUAT Interest rate by month (unit:%/month) -
5 [X5]. R_RO
The risks in the past 3 years of the household,
value 1 = yes and vice versa = 0. -
6 [X6]. S_PTHUOC
Number of children and adults outside the
working age (children under 15 years old, older
than 60 years for men and 55 years for women),
(unit: person) -
7
[X7].
QM_LDONG
Number of main employees in the household
generating income for the family during the past 6 +
27
months (unit: person)
8 [X8]. V_LAM
Employment of the main decision maker/
householder in the family, value 1 = employment
(within 6 months) and vice versa = 0. +
9
[X9]. CS_PTC
The support policies for non-financial activities
such as creating a livelihood environment to help
the poor create jobs, train to transfer of science
and technology knowledge, cultivating and
breeding knowledge, develop the business plans,
labor and occupation, ... value 1 = have support
policy and vice versa = 0.
+
II
DEPENDENT VARIABLE (Y): The income per capita is measured by the total
income of the poor household divided by the number of household members (mil
dong)
Model 2: Microcredit access model
Table 3.4. Measurement of variables in the study of microcredit approach study model
Variable name Sign
expectation
Measurement
Dependent variable:
Microcredit
Binary variable, value=1 if it participates in
microcredit borrowing and value=0, by contrast.
Independent variables:
[X1].VON_XH
+ Households participating in activities in the locality,
value = 1 and vice versa = 0.
[X2]. TS_TGVXH
+ Number of times (frequency) participating in
activities/last 6 months (unit: times)
[X3].V_LAM
+ Householder or main decision maker in the household,
value = 1 means to have employment and vice versa =
0
28
[X4].T_NHAP + Income per capita/year (mil dong)
[X5].V_TRI
- Housing location of the household compared to the
main road (inter-commune traffic) (unit: km)
[X6].K_VUC
+ Living area of household: Urban area, value = 1 and
vice versa = 0.
[X7].CS_TC
Preferential financial policies of the locality, value = 1
means get preferential poli
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