{"id":"forecast_backtest","columns":[{"name":"metric_id","type":["string","null"]},{"name":"scenario","type":["string","null"]},{"name":"origin_period","type":["integer","null"]},{"name":"target_period","type":["integer","null"]},{"name":"actual_value","type":["number","null"]},{"name":"forecast_value","type":["number","null"]},{"name":"signed_error_forecast_minus_actual","type":["number","null"]},{"name":"absolute_error","type":["number","null"]},{"name":"percentage_error","type":["number","null"]},{"name":"recent_mean_yoy_growth","type":["number","null"]},{"name":"ten_year_cagr_or_mean","type":["number","null"]},{"name":"base_growth_rate","type":["number","null"]},{"name":"growth_volatility","type":["number","null"]},{"name":"training_period_count","type":["integer","null"]},{"name":"model","type":["string","null"]},{"name":"notes","type":["string","null"]}],"empty_values":"CSV empty fields and JSON null mean unavailable; an explicit zero is numeric zero.","source_reference":"Source URL plus page, row, column, or line fields where supplied. Financial columns keep their own budget stages."}