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Data Analysis Practice

Tech11 min

Before Adjusting a Fee Rate, Identify Which Transactions Will Be Affected

Recalculate payment fee rate changes using two public hard problems from DABstep: how conditions map to MCC codes, how the affected transaction set is determined, why fixed amounts offset in the differential, and how individual differentials are independently verified.

Tech #Data Agent #Data Analysis Practice #Evaluation

2026-10-22Read

Tech12 min

Hotel Data in Practice: Why Brand Rankings Change

Recalculating hotel brand rankings using two public tasks from InfiAgent-DABench to examine how eligibility thresholds determine the evaluation scope, why denominators cannot be mixed, and how regrouping recalculations can overturn overall conclusions.

Tech #Data Agent #Data Analysis Practice #Evaluation

2026-10-20Read