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CPS1159 Philip Hans Franses et al.
                0       2        0.5       0.5      0.004   (0.180)    1.758   (0.146)
                0       2        0.5       2.0      0.004   (0.200)    1.436   (0.158)
                0       2        2.0       0.5      0.003   (0.190)    1.770   (0.164)
                0       2        2.0       2.0      0.004   (0.210)    1.444   (0.174)

                5       -2       0.5       0.5      5.002   (0.158)    -1.926   (0.126)
                5       -2       0.5       2.0      5.001   (0.175)    -1.914   (0.128)
                5       -2       2.0       0.5      5.001   (0.175)    -1.914   (0.148)
                5       -2       2.0       2.0      5.001   (0.190)    -1.637   (0.141)

                5       0        0.5       0.5      5.003   (0.161)    -0.084   (0.129)
                5       0        0.5       2.0      5.003   (0.162)    -0.104   (0.122)
                5       0        2.0       0.5      5.002   (0.175)    -0.072   (0.153)
                5       0        2.0       2.0      5.002   (0.175)    -0.096   (0.141)

                5       2        0.5       0.5      5.004   (0.176)    1.758   (0.148)
                5       2        0.5       2.0      5.004   (0.197)    1.436   (0.161)
                5       2        2.0       0.5      5.003   (0.191)    1.770   (0.165)
                5       2        2.0       2.0      5.004   (0.211)    1.444   (0.185)

               Table 7: Symbolic regression results. Bootstrapped standard errors are in
                                            parentheses.
                 Forecast origin        ß0               ß1         p value Wald test

                 January, year t-1   2.879   (2.448)   -0.141   (0.762)   0.032
                 February, year t-1   3.041   (2.014)   -0.206   (0.648)   0.028
                 March, year t-1   2.689   (2.122)   -0.080       (0.658)   0.021
                 April, year t-1   2.683   (2.090)   -0.076   (0.659)    0.033
                 May, year t-1     2.147   (2.231)     0.118      (0.734)   0.055
                 June, year t-1    1.773   (2.485)     0.250   (0.786)   0.108
                 July, year t-1    0.649   (2.927)     0.655   (0.956)   0.394
                 August, year t-1   -0.104   (2.640)     0.941   (0.893)   0.703
                 September, year t-1   0.554   (2.682)     0.703   (0.959)   0.749
                 October, year t-1   -0.459   (1.417)     1.148   (0.502)   0.944
                 November, year t-1   -0.412   (1.395)     1.156   (0.501)   0.951
                 December, year t-1   -0.324   (0.889)     1.131   (0.318)   0.915

                 January, year t   -0.000   (0.812)     0.999   (0.269)   1.000
                 February, year t   -0.167   (0.559)     1.043   (0.188)   0.951
                 March, year t     0.052   (0.429)     0.987   (0.146)   0.992
                 April, year t     -0.087   (0.420)     1.016   (0.141)   0.966
                 May, year t       -0.009   (0.403)     0.976   (0.130)   0.880
                 June, year t      -0.075   (0.386)     0.990   (0.127)   0.789
                 July, year t      -0.142   (0.331)     1.025   (0.106)   0.856
                 August, year t    -0.068   (0.332)     1.011   (0.118)   0.956
                 September, year t   -0.077   (0.317)     1.000   (0.107)   0.855
                 October, year t   -0.057   (0.291)     1.011   (0.109)   0.965
                 November, year t   -0.095   (0.276)     1.024   (0.105)   0.923
                 December, year t   -0.087   (0.219)     1.006   (0.081)   0.760






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