Forecast
Forward projections from the prediction engine — baseline plus an optimistic/pessimistic band and a confidence interval, per macro indicator. These are PROJECTIONS, not observations: generated from observed history, never a guarantee. A country we hold no projections for is shown honestly.
Forecast
Need it as JSON? GET /api/v1/forecast/country/{iso3}.
Tonga: forward projections across 15 macro indicators, horizons 2025, 2026, 2027, 2028, 2029, 2030, 2034, 2035. These are projections, not observations — each carries an optimistic/pessimistic band and a confidence interval, anchored against the latest observed value where one is held.
Nowcast
Each indicator nowcast from its strongest leading series — inferable from observations already in hand.
For each indicator, Tonga's strongest leading series is fit by ordinary least squares over their shared observed history, then the leader's already-observed recent values project the target — so the next year or two is inferable from data already in hand. These are nowcasts from a leading correlation: correlation, not causation, and not a guaranteed forecast.
Led by Unemployment by 3 years (it moves withthe target; r = 0.663 over 32 obs).
| Year | Nowcast | Implied by Unemployment in |
|---|---|---|
| 2026 | 3.35 | 2023 (1.65) |
Latest observed-7.2(2026)· IMF DataMapper API
| Year | Baseline | Optimistic | Pessimistic | Conf. band |
|---|---|---|---|---|
| 2026 | -4.36 | -0.56 | -8.16 | -5.21 – -3.52 |
| 2028 | -4.49 | 2.1 | -11.07 | -6.05 – -2.93 |
| 2030 | -4.61 | 3.89 | -13.11 | -6.71 – -2.51 |
| 2035 | -4.92 | 7.11 | -16.94 | -8.16 – -1.68 |
Blended 1-yr-ahead-8.06· skill-weighted across models
Track record±2.84typical miss · 1 realized · 39% MAPE
Method: linear_trend; lookback 8y; horizon 1y; confidence 80%
Latest observed16.9(2024)· World Bank Indicators API
| Year | Baseline | Optimistic | Pessimistic | Conf. band |
|---|---|---|---|---|
| 2025 | 15.56 | 23.47 | 8.71 | 14.18 – 16.94 |
| 2027 | 12.89 | 26.59 | 1.01 | 10.31 – 15.46 |
| 2029 | 10.21 | 27.9 | 0 | 6.87 – 13.56 |
| 2034 | 3.53 | 28.55 | 0 | 0 – 7.67 |
Blended 1-yr-ahead16.73· skill-weighted across models
Track record±4.04typical miss · 1 realized · 24% MAPE
Method: linear_trend; lookback 8y; horizon 1y; confidence 80%
Latest observed679.2m(2025)· World Bank Indicators API
| Year | Baseline | Optimistic | Pessimistic | Conf. band |
|---|---|---|---|---|
| 2026 | 708.6m | 745.8m | 676.4m | 686.7m – 730.6m |
| 2028 | 781.4m | 845.3m | 726.1m | 723.6m – 839.3m |
| 2030 | 854.3m | 936.7m | 782.8m | 757.3m – 951.3m |
| 2035 | 1bn | 1.2bn | 935.3m | 821.4m – 1.3bn |
Blended 1-yr-ahead759.5m· skill-weighted across models
Track record±18.4mtypical miss · 1 realized · 3% MAPE
Method: weighted_composite; lookback 8y; horizon 1y; confidence 80%
Latest observed2.8(2025)· World Bank Indicators API
| Year | Baseline | Optimistic | Pessimistic | Conf. band |
|---|---|---|---|---|
| 2026 | 2.89 | 8.47 | -1.94 | 1.92 – 3.87 |
| 2028 | 3.29 | 12 | -5.08 | 1.52 – 5.06 |
| 2030 | 3.68 | 12 | -7.13 | 1.31 – 6.05 |
| 2035 | 4.67 | 12 | -10 | 0.98 – 8.35 |
Blended 1-yr-ahead2.15· skill-weighted across models
Track record±1.09typical miss · 1 realized · 61% MAPE
Method: weighted_composite; lookback 6y; horizon 1y; confidence 80%
Latest observed6.5k(2025)· World Bank Indicators API
| Year | Baseline | Optimistic | Pessimistic | Conf. band |
|---|---|---|---|---|
| 2026 | 6.8k | 7.2k | 6.5k | 6.6k – 7.1k |
| 2028 | 7.6k | 8.2k | 7k | 7k – 8.1k |
| 2030 | 8.3k | 9.1k | 7.6k | 7.4k – 9.2k |
| 2035 | 10.1k | 11.3k | 9.1k | 8k – 12.2k |
Blended 1-yr-ahead7.7k· skill-weighted across models
Track record±504.11typical miss · 1 realized · 7% MAPE
Method: weighted_composite; lookback 8y; horizon 1y; confidence 80%
Latest observed24(2026)· IMF DataMapper API
| Year | Baseline | Optimistic | Pessimistic | Conf. band |
|---|---|---|---|---|
| 2026 | 24.84 | 29.15 | 19.86 | 23.78 – 25.9 |
| 2028 | 20.71 | 28.19 | 12.09 | 18.57 – 22.86 |
| 2030 | 16.59 | 26.24 | 5.45 | 13.78 – 19.4 |
| 2035 | 6.28 | 19.92 | 0 | 3.17 – 9.38 |
Blended 1-yr-ahead21.75· skill-weighted across models
Track record±0.84typical miss · 1 realized · 3% MAPE
Method: linear_trend; lookback 10y; horizon 1y; confidence 80%
Latest observed60.68(2024)· World Bank Indicators API
| Year | Baseline | Optimistic | Pessimistic | Conf. band |
|---|---|---|---|---|
| 2025 | 59.96 | 66.79 | 53.13 | 57.96 – 61.97 |
| 2027 | 58.52 | 70.35 | 46.7 | 53.9 – 63.14 |
| 2029 | 57.09 | 72.36 | 41.82 | 50.18 – 63.99 |
| 2034 | 53.49 | 75.08 | 31.9 | 41.63 – 65.35 |
Blended 1-yr-ahead60.12· skill-weighted across models
Track record±3.64typical miss · 1 realized · 6% MAPE
Method: linear_trend; lookback 8y; horizon 1y; confidence 80%
Latest observed5.59(2025)· World Bank Indicators API
| Year | Baseline | Optimistic | Pessimistic | Conf. band |
|---|---|---|---|---|
| 2026 | 6.91 | 15.73 | -2.54 | 4.84 – 8.98 |
| 2028 | 10.28 | 25.57 | -5 | 6.4 – 14.17 |
| 2030 | 13.66 | 33.39 | -5 | 8.19 – 19.13 |
| 2035 | 22.1 | 50 | -5 | 12.38 – 31.82 |
Blended 1-yr-ahead3.2· skill-weighted across models
Track record±3.11typical miss · 1 realized · 82% MAPE
Method: exponential_smoothing; lookback 6y; horizon 1y; confidence 80%
Latest observed26.15(2024)· World Bank Indicators API
| Year | Baseline | Optimistic | Pessimistic | Conf. band |
|---|---|---|---|---|
| 2025 | 25.33 | 34.03 | 17.8 | 23.69 – 26.98 |
| 2027 | 23.69 | 38.75 | 10.63 | 20.4 – 26.98 |
| 2029 | 22.04 | 41.49 | 5.18 | 17.5 – 26.58 |
| 2034 | 17.92 | 45.42 | 0 | 11.12 – 24.71 |
Blended 1-yr-ahead26.21· skill-weighted across models
Track record±0.47typical miss · 1 realized · 2% MAPE
Method: weighted_composite; lookback 8y; horizon 1y; confidence 80%
Latest observed103.7k(2025)· World Bank Indicators API
| Year | Baseline | Optimistic | Pessimistic | Conf. band |
|---|---|---|---|---|
| 2026 | 103.8k | 108.8k | 99.3k | 100.6k – 107.1k |
| 2028 | 103.4k | 108.3k | 98.8k | 95.7k – 111k |
| 2030 | 102.9k | 107.8k | 98.4k | 91.2k – 114.6k |
| 2035 | 101.7k | 106.5k | 97.2k | 80.6k – 122.8k |
Blended 1-yr-ahead98.5k· skill-weighted across models
Track record±4.8ktypical miss · 1 realized · 5% MAPE
Method: exponential_smoothing; lookback 10y; horizon 1y; confidence 80%
Latest observed3.31(2025)· World Bank Indicators API
| Year | Baseline | Optimistic | Pessimistic | Conf. band |
|---|---|---|---|---|
| 2026 | 4 | 11.4 | -1.55 | 3.01 – 4.99 |
| 2028 | 5.57 | 15 | -4.05 | 3.7 – 7.44 |
| 2030 | 7.14 | 15 | -5.27 | 4.5 – 9.78 |
| 2035 | 11.07 | 15 | -6.49 | 6.37 – 15 |
Blended 1-yr-ahead3.68· skill-weighted across models
Track record±1.3typical miss · 1 realized · 44% MAPE
Method: weighted_composite; lookback 7y; horizon 1y; confidence 80%
Latest observed412.7m(2025)· World Bank Indicators API
| Year | Baseline | Optimistic | Pessimistic | Conf. band |
|---|---|---|---|---|
| 2026 | 425.2m | 487.7m | 362.7m | 408.9m – 441.6m |
| 2028 | 460m | 568.2m | 351.7m | 421.3m – 498.6m |
| 2030 | 494.7m | 634.5m | 354.9m | 433.7m – 555.6m |
| 2035 | 581.5m | 779.2m | 383.8m | 458.2m – 704.8m |
Blended 1-yr-ahead439.8m· skill-weighted across models
Method: weighted_composite; lookback 8y; horizon 1y; confidence 80%
Latest observed10.98(2025)· World Bank Indicators API
| Year | Baseline | Optimistic | Pessimistic | Conf. band |
|---|---|---|---|---|
| 2026 | 10.74 | 13.85 | 7.64 | 10.1 – 11.39 |
| 2028 | 10.46 | 15.84 | 5.09 | 9.14 – 11.79 |
| 2030 | 10.33 | 17.26 | 3.39 | 8.44 – 12.22 |
| 2035 | 10.22 | 20.03 | 0.41 | 7.08 – 13.36 |
Blended 1-yr-ahead11.21· skill-weighted across models
Track record±0.49typical miss · 1 realized · 5% MAPE
Method: mean_reversion; lookback 10y; horizon 1y; confidence 80%
Latest observed412.7m(2025)· World Bank Indicators API
| Year | Baseline | Optimistic | Pessimistic | Conf. band |
|---|---|---|---|---|
| 2026 | 425.2m | 487.7m | 362.7m | 408.9m – 441.6m |
| 2028 | 460m | 568.2m | 351.7m | 421.3m – 498.6m |
| 2030 | 494.7m | 634.5m | 354.9m | 433.7m – 555.6m |
| 2035 | 581.5m | 779.2m | 383.8m | 458.2m – 704.8m |
Blended 1-yr-ahead439.8m· skill-weighted across models
Method: weighted_composite; lookback 8y; horizon 1y; confidence 80%
Latest observed2.01(2025)· World Bank Indicators API
| Year | Baseline | Optimistic | Pessimistic | Conf. band |
|---|---|---|---|---|
| 2026 | 1.88 | 2.5 | 1.27 | 1.76 – 2.01 |
| 2028 | 1.64 | 2.71 | 0.57 | 1.4 – 1.88 |
| 2030 | 1.39 | 2.77 | 0.01 | 1.07 – 1.72 |
| 2035 | 0.78 | 2.73 | 0 | 0.32 – 1.24 |
Blended 1-yr-ahead2.06· skill-weighted across models
Method: linear_trend; lookback 6y; horizon 1y; confidence 80%
Reliability badges show each indicator's best model skill— how much it beats a naive last-value forecast, measured out-of-sample on that series' own observed history (backtested one-step-ahead). A track record, not a guarantee of future accuracy.
Generated by the prediction engine (model prediction-engine-v1) on 2026-10-31 from observed history. Projections, not observations — never a guarantee of future values.
Machine-readable: GET /api/v1/forecast/country/TON · Country page → · Full brief → · API docs
| 2027 |
| 4.03 |
| 2024 (1.97) |
| 2028 | 4.13 | 2025 (2.01) |
Fit: CPI inflation ≈ -0.2374 + 2.1728·Unemployment. Correlation, not causation.
Led by Current account / GDP by 3 years (it moves inversely tothe target; r = -0.544 over 43 obs).
| Year | Nowcast | Implied by Current account / GDP in |
|---|---|---|
| 2026 | 322.3m | 2023 (-7.9) |
| 2027 | 304.7m | 2024 (-6.7) |
| 2028 | 269.5m | 2025 (-4.3) |
Fit: GDP (current US$) ≈ 206430000.5528 + -14671526.5098·Current account / GDP. Correlation, not causation.
Led by Real GDP growth by 2 years (it moves withthe target; r = 0.53 over 44 obs).
| Year | Nowcast | Implied by Real GDP growth in |
|---|---|---|
| 2026 | -6.86 | 2024 (1.72) |
| 2027 | -5.94 | 2025 (2.8) |
Fit: Current account / GDP ≈ -8.3122 + 0.8461·Real GDP growth. Correlation, not causation.
Machine-readable: GET /api/v1/nowcast/country/TON?indicator= · API docs
