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Telephone Campaigns to Encourage Vaccination : Do they work?

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Frame of Image on the vaccination rate of children born in 1999? Why / why not?
• Treatment group = 25,000 who picked up the telephone • Comparison group = 35,000 who did not pick up the telephone • But households self-selected into picking up the phone or not. • So, there may be other important differences between the treatment group and the comparison group that are affecting the vaccination rates.
Self Selection problem
Phone Call
= Eligible = Ineligible
Question 3: Why do you think that the impact estimated using Method 2 is smaller than the impact estimated using Method 1?
• In Table 2, we see that there are differences between the households that picked up the phone and those that did not. • The treatment group in Method 1 had more households that are naturally more likely to go vaccinate their children, eg: – Households with older children – Male headed households – Households from the North • Once we “wash away” those differences, the estimated effect of the phone calling campaign has to be smaller.
Question 4: Do you think the impact estimated with Method 2 represents the true causal effect of the phone-calling campaign on the vaccination of children born in 1999? Why or why not?
• Method 2 controls for the observable/measurable differences • But there may still be differences between the two groups that we can not observe or measure, and that are related both to “pickup up the phone” and “vaccinating children”.
Question 5: Can you correct the weaknesses of Method 1 by taking a ran


Full Text
Title Telephone Campaigns to Encourage Vaccination
Similar Titles
Sub Title

Do they work?

Material Type Proceedings
Author(English)

Donald Baum

Date 2014-05
Event

East Asia Regional Impact Evaluation Wokshop

Pages 19
Language English
File Type Documents
Original Format pdf
Subject Territorial Development
Holding KDI School of Public Policy and Management