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author: niplav, created: 2022-07-15, modified: 2026-06-27, language: english, status: finished, importance: 6, confidence: certain

Iqisa is a library for handling and comparing forecasting datasets from different platforms.

Iqisa: A Library For Handling Forecasting Datasets

The eventual success of my archives reinforced my view that public permission-less datasets are often a bottleneck to research: you cannot guarantee that people will use your dataset, but you can guarantee that they won’t use it.

—Gwern Branwen, “2019 News”, 2019

Iqisa is a collection of forecasting datasets and a simple library for handling those datasets. Code and data available here. Documentation is here.

So far it contains data from:

The Good Judgment Project: ~790k market trades+~3.14m survey predictions≈3.9m forecasts
The Metaculus public API: ~390k forecasts
PredictionBook: ~64k forecasts

for a total of ~4.38m forecasts, as well as code for handling private Metaculus data (available to researchers on request to Metaculus), but I plan to also add data from various other sources.

The documentation can be found here, but a simple example for using the library is seeing whether traders with more than 100 trades have a better Brier score than traders in general:

import gjp
import iqisa as iqs
market_fcasts=gjp.load_markets()

def brier_score(probabilities, outcomes):
    return np.mean((probabilities-outcomes)**2)

def brier_score_user(user_forecasts):
    user_right=(user_forecasts['outcome']==user_forecasts['answer_option'])
    probabilities=user_forecasts['probability']
    return np.mean((probabilities-user_right)**2)

trader_scores=iqs.score(market_fcasts, brier_score, on=['user_id'])
filtered_trader_scores=iqs.score(market_fcasts.groupby(['user_id']).filter(lambda x: len(x)>100), brier_score, on=['user_id'])

And we can see:

>>> np.mean(trader_scores)
score    0.159194
dtype: float64
>>> np.mean(filtered_trader_scores)
score    0.159018
dtype: float64

Concluding that more experienced traders are only very slightly better at trading.

Advantages

Iqisa offers some advantages over existing datasets:

Ease of use: data can be loaded using two lines of code
Unified data format: the data from different platforms and projects has been brought into the same format that enables easier comparisons and cross-platform analyses
Pre-defined functionalities for analysis: Some functionalities (such as for scoring or aggregation) have been implemented for easier use

Requirements

Uses

Possible Projects

Take questions from different platforms that are close to each other on sentence2vec, and check which platform made the better predictions on that question.

Known Bugs

Since this is a project I'm now doing in my free time, it might not be as polished as it should be. Sorry :-/

If you decide to work with this library, feel free to contact me.

Issues with the time fields
- Not all time-related fields have timezone information attached to them.
Some predictions in the dataset have occurred after question resolution. There should be a way to filter those out programmatically.
The columns of the datasets are not sorted the same way for question DataFrames and forecast DataFrames.
I fear that despite my best efforts, not all data frome the GJP data has been transferred_20%.
The default fields in the Metaculus & PredictionBook data should be NA more often than they are right now.
The documentation is still slightly spotty, and tests are mostly nonexistent.
Some variables shouldn't be exposed, but are.

Feature Wishlist

Create a pip package
Add data from more platforms