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Matching Estimates of the Impact of Over-the-Counter Emergency Birth Control on Teenage Pregnancy

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Abstract

In this paper we demonstrate how matching estimators can be used to evaluate policy interventions which are implemented in relatively few regions at different times. Our technique is based on translating calendar time into 'experimental time' to provide a common starting point for entry by different areas into the scheme. Such an approach is likely to have many applications, in particular to cases of state- or country- level interventions for which only aggregate data are available. We illustrate the technique using the case of free over-the-counter access to emergency birth control (EBC) for teenagers in England. We construct matching estimates of the impact of this scheme on the under-18 conception rate in local authorities. Irrespective of either the matching or the adjustment procedure, we do not find evidence that pharmacy EBC schemes led to significantly lower teenage pregnancy rates.

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File URL: http://www.nottingham.ac.uk/%7Elizecon/RePEc/pdf/matching.pdf
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Bibliographic Info

Paper provided by Industrial Economics Division in its series Occasional Papers with number 15.

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Date of creation: 10 2005
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Handle: RePEc:nub:occpap:15

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Keywords: matching estimators; family planning; teenage pregnancy; emergency birth control;

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  1. Paton, David, 2002. "The economics of family planning and underage conceptions," Journal of Health Economics, Elsevier, vol. 21(2), pages 207-225, March.
  2. David Paton, 2004. "Random Behaviour Or Rational Choice? Family Planning, Teenage Pregnancy And STIs," Royal Economic Society Annual Conference 2004 135, Royal Economic Society.
  3. Richard Blundell & Monica Costa Dias, 2000. "Evaluation methods for non-experimental data," Fiscal Studies, Institute for Fiscal Studies, vol. 21(4), pages 427-468, January.
  4. Alberto Abadie & Guido W. Imbens, 2002. "Simple and Bias-Corrected Matching Estimators for Average Treatment Effects," NBER Technical Working Papers 0283, National Bureau of Economic Research, Inc.
  5. A. Smith, Jeffrey & E. Todd, Petra, 2005. "Does matching overcome LaLonde's critique of nonexperimental estimators?," Journal of Econometrics, Elsevier, vol. 125(1-2), pages 305-353.
  6. Heckman, James J & Ichimura, Hidehiko & Todd, Petra E, 1997. "Matching as an Econometric Evaluation Estimator: Evidence from Evaluating a Job Training Programme," Review of Economic Studies, Wiley Blackwell, vol. 64(4), pages 605-54, October.
  7. Akerlof, George A & Yellen, Janet L & Katz, Michael L, 1996. "An Analysis of Out-of-Wedlock Childbearing in the United States," The Quarterly Journal of Economics, MIT Press, vol. 111(2), pages 277-317, May.
  8. Smith, Jeffrey & Todd, Petra, 2005. "Rejoinder," Journal of Econometrics, Elsevier, vol. 125(1-2), pages 365-375.
  9. Heckman, James J & Ichimura, Hidehiko & Todd, Petra, 1998. "Matching as an Econometric Evaluation Estimator," Review of Economic Studies, Wiley Blackwell, vol. 65(2), pages 261-94, April.
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Cited by:
  1. Sourafel Girma & David Paton, 2013. "Does Parental Consent for Birth Control Affect Underage Pregnancy Rates? The Case of Texas," Demography, Springer, vol. 50(6), pages 2105-2128, December.
  2. Girma, Sourafel & Paton, David, 2011. "The impact of emergency birth control on teen pregnancy and STIs," Journal of Health Economics, Elsevier, vol. 30(2), pages 373-380, March.
  3. Xing Lin Feng & Guang Shi & Yan Wang & Ling Xu & Hao Luo & Juan Shen & Hui Yin & Yan Guo, 2010. "An impact evaluation of the Safe Motherhood Program in China," Health Economics, John Wiley & Sons, Ltd., vol. 19(S1), pages 69-94, September.

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