Plans built only from the evidence.

Left-handed batters: economy of 5.06, 0.41 above their economy of 4.66 on all balls bowled (+9%) — allowing for sample size, that change is in the bottom 10% of comparable players (their median change: +1%) — 1638 balls bowled.

Sample: 1,638 balls · high confidence

Australia: average of 39.4, 14.1 above their average of 25.3 on all balls bowled (+56%) — allowing for sample size, that change is in the bottom 15% of comparable players (their median change: +7%) — 864 balls bowled.

Sample: 864 balls · high confidence

India: average of 57.6, 32.3 above their average of 25.3 on all balls bowled (+128%) — allowing for sample size, that change is in the bottom 4% of comparable players (their median change: +13%) — 622 balls bowled.

Sample: 622 balls · medium confidence

England: average of 41.1, 15.8 above their average of 25.3 on all balls bowled (+63%) — allowing for sample size, that change is in the bottom 10% of comparable players (their median change: +4%) — 579 balls bowled.

Sample: 579 balls · medium confidence

Bangladesh: average of 28.5, 3.3 above their average of 25.3 on all balls bowled (+13%) — allowing for sample size, that change is in the bottom 26% of comparable players (their median change: -6%) — 399 balls bowled.

Sample: 399 balls · medium confidence

Australia: average of 33.5, 8.2 above their average of 25.3 on all balls bowled (+32%) — allowing for sample size, that change is in the bottom 26% of comparable players (their median change: +5%) — 536 balls bowled.

Sample: 536 balls · medium confidence

Pakistan: average of 30.7, 5.5 above their average of 25.3 on all balls bowled (+22%) — allowing for sample size, that change is in the bottom 29% of comparable players (their median change: +3%) — 696 balls bowled.

Sample: 696 balls · medium confidence

Sri Lanka: average of 16.1, 9.1 below their average of 25.3 on all balls bowled (-36%) — allowing for sample size, that change is in the top 1% of comparable players (their median change: -2%) — 816 balls bowled.

Sample: 816 balls · high confidence

West Indies: average of 12.7, 12.6 below their average of 25.3 on all balls bowled (-50%) — allowing for sample size, that change is in the top 1% of comparable players (their median change: -4%) — 436 balls bowled.

Sample: 436 balls · medium confidence

India: average of 19.8, 5.5 below their average of 25.3 on all balls bowled (-22%) — allowing for sample size, that change is in the top 9% of comparable players (their median change: +8%) — 429 balls bowled.

Sample: 429 balls · medium confidence

Zimbabwe: average of 12.1, 13.2 below their average of 25.3 on all balls bowled (-52%) — allowing for sample size, that change is in the top 5% of comparable players (their median change: -10%) — 349 balls bowled.

Sample: 349 balls · low confidence

West Indies: average of 16.2, 9.1 below their average of 25.3 on all balls bowled (-36%) — allowing for sample size, that change is in the top 12% of comparable players (their median change: -4%) — 276 balls bowled.

Sample: 276 balls · low confidence