   *weight = population flow*            (0.00000)                                      (0.00000)                                     (0.00000)                                      (0.00000)                                  (0.00000)                                      (0.00000)   Average \# of new cases, 0 week lag                                                                                                                                                                                                                                            Own city                              −0.000[\*\*\*](#TFN00){ref-type="table-fn"}    −0.000[\*\*\*](#TFN00){ref-type="table-fn"}   0.000                                          0.0000                                     −0.000[\*\*\*](#TFN00){ref-type="table-fn"}    −0.000[\*\*\*](#TFN00){ref-type="table-fn"}                                         (0.0000)                                       (0.000)                                       (0.000)                                        (0.000)                                    (0.0000)                                       (0.0000)   Other cities                          −0.000000                                      0.0000                                        0.000                                          −0.000                                     0.00000                                        0.0000[\*\*\*](#TFN00){ref-type="table-fn"}   *weight = inverse distance*           (0.00000)                                      (0.0000)                                      (0.000)                                        (0.000)                                    (0.00000)                                      (0.0000)   Wuhan                                 −0.0000                                        −0.000                                        −0.000                                         −0.000[\*](#TFN00){ref-type="table-fn"}    −0.0000[\*\*](#TFN00){ref-type="table-fn"}     −0.000[\*\*\*](#TFN00){ref-type="table-fn"}   *weight = inverse distance*           (0.0000)                                       (0.000)                                       (0.000)                                        (0.000)                                    (0.0000)                                       (0.000)   Wuhan                                 0.00000[\*\*\*](#TFN00){ref-type="table-fn"}   0.00000                                       0.00000[\*\*\*](#TFN00){ref-type="table-fn"}   −0.00000                                   0.00000[\*\*\*](#TFN00){ref-type="table-fn"}   0.00000[\*\*\*](#TFN00){ref-type="table-fn"}   *weight = population flow*            (0.00000)                                      (0.00000)                                     (0.00000)                                      (0.0000)                                   (0.00000)                                      (0.00000)   Observations                          0,000                                          0,000                                         0,000                                          0,000                                      0,000                                          0,000   Number of cities                      000                                            000                                           000                                            000                                        000                                            000   Weather controls                      YES                                            YES                                           YES                                            YES                                        YES                                            YES   City FE                               YES                                            YES                                           YES                                            YES                                        YES                                            YES   Date FE                               YES                                            YES                                           YES                                            YES                                        YES                                            YES  The dependent variable is the number of daily new confirmed cases. precipitation are used as instrumental variables in the IV regressions. by provinces.  p\<0.00,  p\<0.00,  p\<0.0.  ######   Social and Economic Factors Mediating the Transmission of COVID-00, Jan 00 - Feb 0                                              \(0\)                                          \(0\)                                          \(0\)                                            \(0\)                                          \(0\)   ----------------------------------------- ---------------------------------------------- ---------------------------------------------- ------------------------------------------------ ---------------------------------------------- -----------------------------------------------   Average \# of new cases, 0 week lag                                                                                                                                                                                                        Own city                                  0.000                                          0.000                                          0.000                                            0.000                                          0.0000                                             (0.000)                                        (0.000)                                        (0.000)                                          (0.000)                                        (0.000)   × population density                      −0.000000                                                                                     −0.000000[\*\*\*](#TFN00){ref-type="table-fn"}   −0.00000[\*\*](#TFN00){ref-type="table-fn"}    