Supporting Data and Reproducible Code for Generalized Logistics Costs and Route-Switching Thresholds for Iranian Trade

Supporting Research Dataset and Reproducibility Archive — Study 1 This repository contains the supporting data, source documentation, computational assumptions, Python scripts, and numerical results associated with the research manuscript entitled “Generalized Logistics Costs and Route-Switching Thresholds for Iranian Trade: Southern Gateways versus the Black Sea.” The archive examines the generalized logistics costs of alternative trade routes connecting China with Tabriz, Iran, including southern gateways and Black Sea routes through Poti and Armenia. The research materials include: Historical field estimates and dated indicative freight quotations. Source references and documentation of quotation limitations. Freight-cost components, including included, excluded, and unresolved charges. Route-switching thresholds and sensitivity analyses. Numerical scenario results and synthetic diagnostic experiments. Reproducible Python 3 computational scripts. Verification procedures and supporting tables. Historical field estimates are distinguished from third-party indicative rates. The underlying quotations are not represented as confirmed, booked, door-to-door transport services. Synthetic numerical scenarios are provided for analytical comparison and are not presented as observed market frequencies. The Python scripts use the standard library and allow independent reproduction of the principal numerical calculations. Associated manuscript:Generalized Logistics Costs and Route-Switching Thresholds for Iranian Trade: Southern Gateways versus the Black Sea Author: Hossein Atar Jannesar Nobari Purpose: Research transparency, reproducibility, scholarly citation, and long-term preservation of supporting materials.