Factors affect health expenses of the households in Vietnam’s North & South central coast

The paper would like to define the factors which affect the health expense for the family household at the north and south central coast. Research methods: the topic incorporates the following two main approaches: (i) Descriptive statistics method: used to synthetic, analyze, compile data and make basic comments; (ii) Quantitative analysis using a multivariate linear regression model determines the factors that affect the level of household health expenditure. I find out the linear regression econometric model for the expense of the health of the north central & seashore Vietnam middle households: lnHExpc = 0,3589 + 0,299*lnExpc + 0,1149*lnEExpc + 1,624*Ethinic + 0,0122*Age–0,000023*Age2–0,0931*Gender+0,1917*Hhsize+0,0828*CGender+0,1666*Urban. SpendingisoneoftheimportantdailyissuesofVietnamesehouseholds.Andthehealthexpenses of the households is one of the hot title of Vietnam. This paper indicates the literature review of the north central & seashore Vietnam middle households health expenses. The next part is the meth-ods of the research. The paper shows the research result of the north central & seashore Vietnam middle households health expenses. The paper also presents the discussion of the north central & seashore Vietnam middle households health expenditures. And then this paper displays the conclusion of the north central & seashore Vietnam middle households health expenses. This paper creates the model for the health expenditures. Especially, it is used for the north central & seashore Vietnam middle households health expenses. The data input to this paper model can produce the results. And this results can indicate a plenty of the suggestions. The policy plans can be created base on them. Because the health is important. Therefore, the health expenses is also important. So this paper has the very important value. Perhaps this paper can promote its importance to the world.


INTRODUCTION
HExpc i = f (X h , X c , µ i ) Inside, HExpc is applied logarithm function to become lnHExpc, lnHExpc is the logarithm of household health expenditures; X h are household characteristics that have a direct impact on household health expenditures; X c are community elements (household living area) have a direct impact on household health expenditures; µ i is a synthesis of all the unobservable characteristics of economics, household and community (living area) influence on total household health expenditure. Applying the above model, the general regression model of the thesis is expressed as follows: Model: lnHExpc=β 0 + β 1 lnExpc + β 2 lnFExpc + β 3 lnEExpc + β 4 Urban + β 5 hhsize + β 6 Ethinic + β 7 Gender + β 8 Edu + β 9 Age + β 10 Age2 + β 11 CGender + β 12 Insure + u i The object of the study in the paper is the health care expenses, while the households in the central and northern coastal areas are the subjects of the study.

THE NECESSITY OF THE TOPIC
Health is an aspect of happiness, is an important component of human capital. Report by World Bank (1993) also mentioned that economic development (spectacular poverty reduction development) and education is the focus for good health, etc…. On the world, not only in the present phase but in every age, health always plays an important role in promoting social development, reduce poverty and is an important contributor to economic growth. Vietnam as well as other countries see health as the top national policy and always devotes special investment to the cause of health development. For individuals, a healthy foundation will give the individual an advantage in many aspects of life such as increasing opportunities in life, increase labor productivity, increased communication ability, increased technology access competence and that is the factor that affects the income level is higher and higher. So it is because of the difficult life that people in the North Central and Central Coast spend more or less on health care than other regions and the proportion of health expenditures relative to other expenditures such as food, education, how are they? The household's interest in medical care for the child may be represented by the level of health expenditure of the child in the Vietnamese household. The factors about economic -society of the household affecting health care spending decisions is a matter of concern for consideration and analysis, it is expected to provide useful information for health policy makers to improve and develop the quality of health care. Article: "factors affect health expenses of the households in vietnam'sof north central & seashore vietnam middlesouth central coast" to help clarify the above problem.

Research subjects
Expense, households in the North Central Coast and Central Coast.

Research Methods
The topic incorporates the following two main approaches: • Descriptive statistics method: used to synthetic, analyze, compile data and make basic comments.
• Quantitative analysis using a multivariate linear regression model determines the factors that affect the level of household health expenditure.

Methods for collecting VHLSS data
The survey applied the direct interview method. Investigators come to the household, meet household heads and related household members for interviews and write information on the household questionnaire. The leader of the survey team interviewed the commune leaders and relevant local officials and recorded the informations in the commune interview paper.
To ensure the quality of information collected, The survey did not accept indirect survey or copied informations from other sources available on the interview sheet.

THE MODELS OF THEORETICAL RESEARCH:
Besides, other factors such as the age of the household head also affect the use of health services because age reflects perceived benefits and income. Poverty affects patients' ability to pay for medical care, so it reflects the use of health services quite clearly 1 . Houthakker (1957) examined three types of functions to study econometric models between expenditure on a specific commodity and total household expenditure on a linear basis, semi logarithm and dual logarithm. He noted that the linear function form is not suitable for reflecting the relationships in expenditure and has used the dual logarithm function developed from Engel's theorem theory. The mathematical model is as follows: 2 log Yi = α i + β i log X 1 + γi log X2 + ε¬i Inside: Yi is spending on the i th group, X¬1 is the total expenditure, X2 is the number of members in the household, εi is the standard error, α i , β i and γ¬i The coefficients are estimated from the regression model by the OLS method. And β i & γi is the elasticity of total expenditure and household size when considered in relation to expenditure for i th goods. 3,4 In the 1998 research, Ndanshau has formulated a general estimation model for household expenditure as below: 5 Cij = f (TEXj, Aj ,HSj, Edj ) Inside: Ci is the j th household's expenditure for i th goods; TEXj is the total expenditure of the j th household; Aj, Edj is the age and the education level of the j th household head, HSj is the scale (number of household members) of the j th household. From the general model above, Ndanshau (1998) has been proposed to develop into two types of the models: linear and lin-log. 5 The linear form is as follows: Ci = αi + β iTEX + γiA + δ iHS +ψiEd + ui The lin -log format is as below: Ci = αi + β ilogTEX + γilog A + δ iHS + ψiEd + ui Follow-up study Pravin K. Trivedi (2002)  Similarly, Reinhardt (2000) states that age is positively correlated for both health care costs and total expenditures. 4 The next model we will consider is one of the simplest models of household expenditure by Samuelson (1956). Samuelson argues that "household income is always divided equally and fairly among household members". 6

Model and research data
Econometric model of the research: With the econometric models presented above, most use the form of a dual logarithm function to determine the relationship between the expenditure of a commodity and the total expenditure of the household. This relationship is shown by the logarithm of the value of the variable explaining total household expenditure and the dependent variable for a commodity. Besides, next to the impact of total spending, the authors also find it necessary to include more variables such as food expenditure, expenditures on education of the household, household size, education level of household head, age of household head, etc… to increase the explanation for the model. The variables added to the model can be expressed as logarithms depending on the characteristics of the data and the explanatory meaning of the variables.
The model is based on the distribution of both theory and specific situations in Vietnam, variable selection is also affected by the availability of data. Household health expenditure is affected by society, economics and characteristics of the demographic characteristics of the household. Therefore, the recommended model for the study is: -Xh : Vector of household characteristics may have a direct impact on household health expenditures.
-Xc : Vector of community factors can have a direct impact on household health expenditures.
µi : Incorporates all the unobservable characteristics of economics, household and community impact on total household health expenditure.

Processing research results
Study data are processed by mathematical statistical methods and Stata software.

Education level of household head:
The education level of the household head shows which grade they have completed based on 12th grade system. According to above statistics of Table 1, the average education level of the household head is 7,22. With this factor, we expect the education of the head of household to be correlated (+) with the household health expenditure. 1.1.1 Household size: In this study, the cost of medical predictions of variable household size will make this cost increase. According to statistics data of Table 2, we can see the most crowded family up to 12 members. On average, a household has about 5 members.

Overview of household health expenditures:
Average household expenditure: Average household expenditure includes expenditures for education, health, food, meal, material goods, non-material goods and other expenses for life. According to statistics data of Table 3, the average household expenditure in the North Central Coast and Central Coast is 23431690 VND.

Medical Expenditure
Health care usually varies from country to country, groups and individuals, most are affected by conditions of economics -society and on-site health policies. According to statistics data of Table 4, this is an unwanted expense of the household. This expenditure varies considerably among households.

Average food expenditure:
The share of food expenditure in total household expenditure is an index used to measure living standards high or low. The higher the ratio, the lower the standard of living and vice versa. Vietnam is a developing economy so this proportion has been declining in recent years but still at a high level. According to the General Statistics Office (2010), this proportion decreased from 56.7% in 2002 to 52.9% in 2010.
According to statistics data of Table 5, this indicator is calculated on average for household members. Average food expenditure has a large disparity between households.

Educational expenditure of the household
Household expenditure on education is the portion of household budget used to pay for participation in learning activities, education and training of the members of the family include expenses such as direct costs, indirect costs and opportunity cost. The data in Table 6 shows the level of household expenditure on education.
According to descriptive statistics result, we find that some households do not spend on education (because the minimum value is zero). Educational expenditure among households is large.

Health expenditure by gender of household head
Health expenditure by gender of household head is shown in Table 7.
According to statistics data in Table 7, we can see the female-headed households spend less on health than male-headed households. The expenditure disparity for health among gender groups of household heads is not statistically significant.

Health expenditure by ethnicity of household head:
Kinh headed households are more spend money for health care expenditures than non-Kinh headed households (Table 8) The results of the analysis of the difference in the median health expenditure of the two ethnic groups of the household head indicate that the head of the household is Kinh who spend health expenditure more than the household head of other ethnic groups (statistically significant at 1%). This further demonstrates that Kinh household heads are more interested in caring for their children's health than those of other ethnic groups.

Health expenditure by residence of household:
In urban areas, health expenditure of households is always higher than that of rural areas. The median spending on urban health in the North Central and Central Coastal regions is approximately more 3,670,000 VND and in the countryside is about more 3,018,000 VND. (Table 9). The results of the analysis of average expenditure disparities for health between the two groups of living areas of households show: with a significance level of 1%, the difference in health expenditure in urban households is larger than in rural areas.

Quantitative Results of Factors Affecting Health Expenditures
The general model of the determinants of health expenditure of households in the north central middle and central coast is as follows: Inside, HExpc is applied logarithm function to become lnHExpc, lnHExpc is the logarithm of household health expenditures; X h are household charac-teristics that have a direct impact on household health expenditures; X c are community elements (household living area) have a direct impact on household health expenditures; µ i is a synthesis of all the unobservable characteristics of economics, household and community (living area) influence on total household health expenditure. Applying the above model, the general regression model of the thesis is expressed as follows: Model: lnHExpc=β 0 + β 1 lnExpc + β 2 lnFExpc + β 3 lnEExpc + β 4 Urban + β 5 hhsize + β 6 Ethinic + β 7 Gender + β 8 Edu + β 9 Age + β 10 Age2 + β 11 CGender + β 12 Insure + u i (4.1)

Test steps and regression
For good regression results using the Ordinary Least Squares (OLS), we need to consider whether data sets have a strong correlation between variables. The correlation matrix between variables in the research model is shown below. Afterthat, we split the dependent variable lnHExpc and run the matrix generation command to see the correlation coefficients between

DISCUSSION
Thus, the final model regression results remain the variables that affect the health expenditure of Vietnamese households, including: Average household expenditure, education expenditure, ethnicity of head of household, age and squared age of head of household, gender of household head, size of household, gender of the child and place of residence of the household. To assess the impact of these factors on household health expenditure, we consider the regression coefficients of the model.

Character
The characteristics of the inhabitants of the central coastal region: the nature of thrift due to coping with many risks, the high tolerance to the harsh environment, the characteristics of the Cham people are still many imprints in community life and activities.

Average household expenditure
The coefficient of the average household expenditure variable is +0,299, which means that this variable is positively related to the household health expenditure variable. In terms of other factors constant among households, if the average expenditure of households increases by 1% then spending on health increases by 0.299% and vice versa.

Education expenditure
Expenditure on education is positively related to household health expenditure by the coefficient of 0.1149. That is, in terms of other factors unchanged, when the household increases spending on education by 1%, it also increases spending on health by 0.1149%. These results show that health and education are two non-interchangeable goods, when income increases or average household expenditure increases, spending on education and health increases, but health care increases. increase much more slowly. This is the new point of the study. This shows that education is a special commodity.

Ethnicity of household head
The results of the descriptive analysis in Chapter 3 show that health expenditure of households headed by the Kinh is always much higher than that of other ethnic groups. The model results once again confirm the above statement is correct. In terms of other constant factors, health expenditure of households headed by Kinh is higher than that of other ethnic groups.

Gender of household head
The regression results show that male heads of household spend more on health than female heads while expectation is the opposite.

Age of head of household
The coefficient of the age variable of the head of household is +0.0123, which is positively related to health expenditure, meaning that if other factors remain unchanged, when the age of the head of household increases by 1, that household will increase spending on health by 0.0123%. However, the squared age variable of the head of the household has a coefficient of -0.00002, this shows that not for every increasing age that household increases spending on health, these two variables have the same relationship with age. of the head of household increases initially and when age increases too high, spending on health decreases by 0.002% for each additional age. This could be that there is no longer a health concern, though the expectation is the opposite. The age increases too high is 65.

Household size
The household size variable of the general model has a value of 0.1917, having a positive effect on health expenditure. In terms of other factors constant, when the household size increases by one person, the expenditure on health in that household will increase by 0.1917%. This result is also true to the expectation that a household with one more member will increase health care costs.

Young gender
The gender of the child is also the variable that affects the health expenditure of the household.
The regression results show that parents spend more on health care for boys than girls, perhaps because the notion of men and women over girls causes families to care more about boys than babies. girls.

Place of residence of household
The variable of place of residence of the household has a positive coefficient. In terms of other factors being constant, households living in urban areas will spend more on health than households living in rural areas. However, in the process of analyzing and processing the data, the author has filtered out some inadequate observations and the final data is extracted as follows for the North and South Central Coast:

Number of observations
Total 8795 In the 2010 VHLSS data, the author filtered out the North and South Central Coast with 8795 observations. Health spending has an important feature: unlike education, with education, most households with children of school age spend on education so that their children can get education. Health expenditure is characterized by the fact that during the 2010 VHLSS data collection there will be households with no disease (i.e. the probability of getting sick is zero → means spending on health is also 0). And the econometric model of the study is the formula: HHEXPi = f (Xh, Xc, µi) where lnHExpc is the logarithmic value of household health expenditure (i.e. when health expenditure is 0 → ln (0) = undefined, observations with indefinite lnHExpc are represented by a ". " In the filtered VHLSS data set). Therefore, when running the regression using Stata software, the result table shows that the remaining number of observations is 6631 (that is, Stata software has removed 8795 -6631 = 2164 observations with zero health spending). Therefore, the author makes the statistic to describe the number of observations in the North and South Central Coast is 8795. In the regression results table in chapter 4 and the Stata result table in the appendix, it will be 6,631 observations. The expenditure variables have many zeros so ln should be used for the model.

CONCLUSION
Therefore, the final regression results of the remaining variables affecting the health expenditure of Vietnamese households include: Average household expenditure, educational expenditures, ethnicity of household head, age and squared age of household head, gender of household head, household size, the gender of the children and living place of the household. To assess the impact of factors on household health expenditures, we consider the regression coefficients of the model.

PRACTICAL APPLICATION & POLICY IMPLICATIONS
Currently, in the industrialization and modernization of the country has been posing urgent requirements for the cause of public health care in general and public health care in particular, to create Vietnamese people are physically strong and mentally rich. To achieve this, we need to understand the factors that affect health spending, and then we come up with policies that affect those factors to achieve effective promotion policies. quality of health care.
In order for households to increase their spending on health care, the State should pay more attention to people's lives. The factor that has the strongest impact on health expenditure of Vietnamese households in general and households in the north and south central coast in particular is average expenditure. But average household expenditure is represented by household income. Therefore, if people want to increase spending on health, how can average household spending increase or income must increase. For this study area, people live on agriculture, forestry and fishery, so the State needs policies to support people to increase their income locally, such as forest land allocation, reduction or exemption of agricultural taxes. industry and provide financial support for fishermen to build large boats so that they can fish offshore. In addition, the State should maintain national target programs to reduce the gap between rich and poor in society, support poor households, policy families, remote ar-eas….
Over the past years, our State has had many supportive policies for local people to develop local industries such as, for fisheries, the State has many policies to provide loans with low interest rates so that fishermen can build ships. large for offshore fishing, building seafood processing factories to increase the commercial value, contributing to creating jobs for local women. In forestry, the natural forest is almost no longer present, forest regeneration always goes hand in hand with hunger eradication, poverty reduction, job creation for households living and exploiting forests. Policies such as land and forest allocation for local people to manage and support. Land is allocated to people to plant artificial forests for exploitation and to allocate forests for protection together with the State. For people living and working in urban areas, our State has also issued many policies to increase minimum wages. Specifically, it increased from VND 830,000 from 2010 to VND 1,050,000 in 2012, to VND 2,150,000 by 2015 for region 4 and VND 3,100,000 for zone 1 and is expected to increase further in the coming years. next. It can be said that these policies almost increase people's income in order to improve the quality of life. However, in addition to increasing income for households, it is also necessary to have direct supportive policies for health such as exemptions and reductions in medical expenses, health care policies for the people ... In addition to improving the quality of life, these policies also want households to spend more on health care to improve their health. But in rural areas, facilities are still in short supply, so even if these households want to invest more in health care, it is also very difficult. The State needs to focus more resources on improving and improving facilities for health care. Currently, the Government has been implementing the national target program on building new rural areas nationwide in general and in the North and South Central Coast region in particular. The goal of this program is to develop the agricultural economy, increase the income of rural households and build infrastructure such as irrigation, concreted roads, ... to shorten the gap between rural and urban areas. both in terms of income and geography. In addition to the cost of medical examination and treatment, other health costs are quite new for people, especially households living in rural and mountainous areas such as insurance costs. Nowadays, health insurance for students is compulsory and should be partly supported by the State, but households in rural and mountainous areas have not yet fully participated. Therefore, the Government needs to widely propagate the benefits of purchasing health insurance and have policies to further support this insurance premium. As for differences in health expenditure of households headed by the Kinh or ethnic minorities. Ethnic households are ethnic minorities, often living in rural and mountainous areas, so their incomes are often low. The above supportive policies have partly improved the income of these households. But limited awareness about the importance of health care to bring high income in the future is quite a lot, so even if they are well-off in terms of income, they are less concerned with spending on health care. Therefore, propaganda and mobilization of people to raise awareness is an urgent task. Besides, it is necessary to build medical facilities in the villages so that people can access more easily.
In recent years, despite the tight budget, the Government has also built many medical facilities in the villages and dispatched health workers to take turns in village to serve people. In addition to taking care of the people's health, health workers are also assigned to each remote village, from house to house, to mobilize and raise awareness of the people. Household size has had a positive impact on health expenditure so the Government should continue to mobilize people, especially people in rural and mountainous areas, on family planning. The government's two-child planning policy is enough for the Government to be thoroughly implemented to contribute to improving living standards. Currently, in cities, most people will take care of a career, create a stable job, then have the idea of giving birth to children to create the best conditions for the children physically and mentally. As a result, these families often have increased spending on health care. However, in rural and mountainous areas, child marriage still makes life more difficult when the economy is not abundant. Therefore, in addition to the Government creating favorable conditions for economic development, it is advisable to propagate and advocate for relatives not to get married, marry early for their children when the economy does not ensure the material and spiritual life god later. Today, the law defines the marriage age for men as 20 and 18 for women as a demonstration of this concern. Regarding the child's gender, it is necessary to eliminate the gender discrimination and not allow the sex selection to give birth when there are policies on family planning. Besides, there is also a large proportion of selftreatment in households. Spending on self-treatment indicates that there is ineffective household healthseeking and use behavior. Self-treatment and selftreatment are so dangerous to health that we need to spread the importance of safe drug use, especially in difficult areas where information is scarce. So the Government should prohibit self-treatment and the use of prescription drugs without a prescription.

LIMITATIONS OF THE STUDY
The study uses the 2010 VHLSS data. Up to this point, this data set is old, the results of the study have little application in practice. Subsequent studies should use newer datasets for better future policy making. The research results are inconsistent with the descriptive statistical results, there are many variables that are expected but not statistically significant in the regression model. In the following studies, it is necessary to find the cause of this problem so that the research model can be explained more.
The factor of technological advancement in medicine or in the healthcare sector should be included, which should be considered as an important factor affecting the expenditure function and herbal consumption habits (source of natural medicinal herb in place) is also a factor affecting health expenditure that needs to be considered).
The variable "Expenses for education" should be considered instead of "education level" because if calculating the cost structure for the health, the author needs to include costs of the other related fields people do it independently, but in this case, the perception and awareness of the health can be different depending on the level of the education of each individual).