Overview
Please calculate Herfindahl index for Smartphones market share in the US. Please show your calculations and provide 2-3 sentence analysis of main findings.
See data below:
| 2018Q2 | 2018Q3 | 2018Q4 | 2019Q1 | 2019Q2 | 2019Q3 | 2019Q4 | 2020Q1 | 2020Q2 | |
| Huawei | 16% | 14.60% | 16.20% | 18.90% | 17.70% | 18.60% | 15.20% | 17.80% | 20.20% |
| Samsung | 21% | 20.30% | 18.80% | 23.00% | 23.00% | 21.80% | 18.80% | 21.20% | 19.50% |
| Apple | 12% | 13.20% | 18.30% | 11.80% | 10.20% | 13.00% | 19.90% | 13.30% | 13.60% |
| Xiaomi | 10% | 9.50% | 6.70% | 8.90% | 9.70% | 9.10% | 8.90% | 10.70% | 10.30% |
| OPPO | 9% | 8.40% | 7.90% | 7.40% | 8.90% | 8.70% | 8.30% | 8.30% | 8.70% |