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. Author manuscript; available in PMC: 2019 Jul 2.
Published in final edited form as: Int J Health Econ Manag. 2017 Feb 6:10.1007/s10754-017-9211-2. doi: 10.1007/s10754-017-9211-2

Figure 2: Number of Drugs with A Generic Equivalent Prescribed or Continued During a Physician Visit, NAMCS 2002–2004 and 2006–2009.

Figure 2:

Note: Samples are based on data from the National Ambulatory Medical Care Survey (2002–2004 and 2005–2009). The estimated discontinuities (and standard errors) at age 65 and the fitted lines are from a regression with a cubic polynomial in age fully interacted with a dummy for age greater than or equal to 65 and a dummy for year in or after 2006. Points represent means for people in each age cell (measured in quarters).