2005年-世界发展银行全球_Health_Shocks_in_China___Are_the_Poor_and_Uninsured_Less_Protected__25页_369kb

Summary of "Health Shocks in China: Are the Poor and Uninsured Less Protected?"

Core Content

This paper investigates the economic consequences of health shocks in China, focusing on how they affect income, labor supply, and out-of-pocket medical expenditures. It also examines whether formal health insurance and household income level influence the degree of protection against these shocks.

Main Findings

• Health Shocks and Income:
  Health shocks are associated with a significant reduction in income. A one-level worsening in self-assessed health (SAH) reduces income by approximately 6.2%, and a two-level worsening reduces it by 12.4%.

  • The poverty interaction is not significant, suggesting that health shocks affect all income groups similarly in terms of income loss.
  • The insurance interaction is weak and not significant, implying that health insurance does not strongly mitigate income loss from health shocks.
  • Unearned income for the poor increases slightly due to in-kind transfers from family and friends, but this effect is not strong enough to offset the overall negative impact on income.

• Health Shocks and Labor Supply:

  • Health shocks lead to a reduction in labor supply, particularly for the head of the household. A one-level worsening in SAH results in a 5% decrease in hours worked.
  • There is no evidence that other household members compensate for this loss by working more.
  • The interaction effects with poverty and insurance status are positive but not statistically significant.

• Health Shocks and Out-of-Pocket Expenditures:

  • Health shocks are associated with a significant increase in out-of-pocket medical expenditures. A one-level worsening in SAH leads to an average 9% increase in medical costs.
  • The poor experience smaller increases in out-of-pocket expenditures compared to the non-poor.
  • Insured individuals experience larger increases in out-of-pocket expenditures than the uninsured, which is unexpected and suggests that health insurance may not effectively reduce financial burden.

Key Information

• Data Source: The study uses data from the China Health and Nutrition Survey (CHNS), which includes four rounds (1991, 1993, 1997, 2000) from nine provinces in China.
• Health Shock Measurement:
  • Health shocks are measured through self-assessed health (SAH), with changes in SAH categorized as small (one rating change) or large (two or three rating changes).
  • The study acknowledges that SAH is subject to measurement error, but this is mitigated by focusing on changes in SAH rather than static measures.
• Health Insurance Coverage:
  • Health insurance coverage in China has declined from 31% in 1991 to 24% in 2000.
  • Coverage is lower in urban areas than in rural areas, and urban health insurance (e.g., government and labor insurance schemes) is more prevalent.
  • Despite the lack of direct sickness benefits in government and labor insurance schemes, the insured may still face higher out-of-pocket costs, possibly due to increased healthcare utilization.

Methodology

• The paper uses a panel data model to estimate the impact of health shocks on economic outcomes.
• The model is specified as:
  $$
  \ln y_{it} = X_{it}\beta + \gamma \Delta h_{it} + \alpha_i + u_{it}
  $$
  where $ y_{it} $ is the outcome variable (income, labor supply, medical expenditures), $ X_{it} $ is a vector of time-variant individual and household characteristics, $ \Delta h_{it} $ is the health shock variable, $ \alpha_i $ are individual fixed effects, and $ u_{it} $ is the error term.
• The study also estimates models with interactions between health shocks and insurance/poverty status to test whether these factors influence the economic consequences of health shocks.

Policy Implications

• Health insurance provides limited protection against the economic consequences of health shocks, particularly in terms of income loss and medical expenditures.
• The increase in out-of-pocket expenditures for the insured is unexpected and suggests that health insurance may not effectively reduce financial burden.
• Poor households are more likely to receive in-kind transfers from family and friends in response to health shocks, but these transfers are not sufficient to offset income loss.
• The results highlight the vulnerability of households to health-related income and expenditure shocks, suggesting that sickness insurance is needed to provide more comprehensive protection.

Conclusion

• Health shocks have significant economic consequences, including income loss, reduced labor supply, and increased medical expenditures.
• While health insurance exists, it does not fully protect households from these shocks.
• Poverty does not significantly alter the impact of health shocks on income, but unearned income for the poor increases slightly due to social support.
• The study underscores the need for more robust risk protection mechanisms, particularly sickness insurance, to address the financial vulnerability of households in the face of health shocks.