Replication package for "The Gateway Gap: Port Entry, Transshipment Reallocation and Liner Connectivity in Peru"

Abstract

Replication package for the article "The Gateway Gap: Port Entry, Transshipment Reallocation and Liner Connectivity in Peru" by Alfredo Agustín Merlet Echavarría. The study asks whether the entry of the Port of Chancay (first container movements in June 2025) displaced or complemented the Port of Callao. It combines (1) synthetic-control estimates of UNCTAD's port-level and country-level Liner Shipping Connectivity Index, with placebo-in-space inference, and (2) interrupted time-series estimates, with placebo-in-time tests, of the ratio of transshipment to gateway container traffic at the two Callao terminals, using monthly microdata from Peru's National Port Authority (APN), January 2010 to July 2026. The package contains the Python scripts that reproduce every table and figure, the cleaned monthly terminal panel derived from the APN data, all result tables and figures, a README, and SHA-256 digests of the third-party raw files. The raw UNCTAD, APN and UN Comtrade files are not redistributed because their terms of use were not verified as permitting it; a download script retrieves them from the providers and checks the digests. All results are deterministic and were reproduced identically from a clean copy of the package. Software: Python 3.12 with pandas, numpy, scipy, statsmodels, matplotlib, openpyxl and py7zr (versions in requirements.txt). Code and derived outputs are released under CC BY 4.0; third-party data remain subject to their providers' terms.