00442nam a2200133Ia 450000500170000008000110001710000220002824500280005026000090007852001770008758300210026494200060028599900170029120260716044059.0  aSerial  aHummels, David L.  aTima as a trade barrier  c2013  aExamines two hypotheses viz., lengthly shipping times impose costs that impede trade and firms engaged in trade exhibit significant willingness to pay to avoid these costs.  c2/14/14kSANDRAW  cA  c60066d60066