What this is
Python Pearson r on five annual points. Assumptions: Pokémon Korea revenue proxies its card volume (2021 cards 74% of revenue; later mix unknown); no inventory timing effect; other publishers' Korean imports from Japan grew in step.
The values
- Pearson 2021 25: -0.01
- Pearson 2022 25: -0.7
Some detail is too fine to show here; it is kept in the trainer’s notes.
Where it comes from
Our calculation from other figures in the trainer’s notes:
Show the working
- 2022→24 revenue 89.9→46.5 (−48%) while Japan-origin weight 395→855 t (+117%)
- r(revenue, weight) = −0.70 over 2022–25, −0.01 over 2021–25