BostonHomicide          package:strucchange          R Documentation

_Y_o_u_t_h _H_o_m_i_c_i_d_e_s _i_n _B_o_s_t_o_n

_D_e_s_c_r_i_p_t_i_o_n:

     Data about the number of youth homicides in Boston during the
     `Boston Gun Project'-a policing initiative aiming at lowering
     homicide victimization among young people in Boston.

_U_s_a_g_e:

     data(BostonHomicide)

_F_o_r_m_a_t:

     A data frame containing 2 monthly time series and a factor coding
     seasonality.

     _h_o_m_i_c_i_d_e_s time series. Number of youth homicides,

     _p_o_p_u_l_a_t_i_o_n time series. Boston population (aged 25-44), linearly
          interpolated from annual data.

     _s_e_a_s_o_n factor coding the month.

_D_e_t_a_i_l_s:

     The `Boston Gun Project' is a policing initiative aiming at
     lowering youth homicides in Boston. The project began in early
     1995 and implemented the so-called `Operation Ceasefire'
     intervention which began in the late spring of 1996.

     More information is available at:

     <URL: http://www.ksg.harvard.edu/criminaljustice/research/bgp.htm>

_S_o_u_r_c_e:

     Cooper et al. (2001), Figure 1 and Table I.

_R_e_f_e_r_e_n_c_e_s:

     Cooper S.J., Piehl A.M., Braga A.A., Kennedy D.M. (2001), Testing
     for Structural Breaks in the Evaluation of Programs, Unpublished
     Paper, John F. Kennedy School of Government.

     Kennedy D.M., Piehl A.M., Braga A.A. (1996), Youth Violence in
     Boston: Gun Markets, Serious Youth Offenders, and a Use-Reduction
     Strategy, _Law and Contemporary Problems_, *59*, 147-183.

_E_x_a_m_p_l_e_s:

     data(BostonHomicide)

     fm <- glm(homicides ~ population + season, data = BostonHomicide,
               family = poisson)
     anova(fm, test = "F")

