panel_first_difference

Perform a first-difference estimate for panel data.

The First-Difference estimator for panel data analysis is focusing on the changes between consecutive observations for each entity (such as individuals, companies, or countries). By differencing the data, this method effectively removes entity-specific effects that are constant over time, allowing for the examination of the impact of changes in explanatory variables (x_columns) on the change in the dependent variable (y_column).

Examples

from openbb import obb
obb.econometrics.panel_first_difference(y_column='portfolio_value', x_columns=['risk_free_rate'], data=[{'is_multiindex': True, 'multiindex_names': "['asset_manager', 'time']", 'asset_manager': 'asset_manager_1', 'time': 0, 'portfolio_value': 100000.0, 'risk_free_rate': 0.02}, {'is_multiindex': True, 'multiindex_names': "['asset_manager', 'time']", 'asset_manager': 'asset_manager_1', 'time': 1, 'portfolio_value': 150000.0, 'risk_free_rate': 0.03}, {'is_multiindex': True, 'multiindex_names': "['asset_manager', 'time']", 'asset_manager': 'asset_manager_2', 'time': 0, 'portfolio_value': 150000.0, 'risk_free_rate': 0.03}, {'is_multiindex': True, 'multiindex_names': "['asset_manager', 'time']", 'asset_manager': 'asset_manager_2', 'time': 1, 'portfolio_value': 133333.33, 'risk_free_rate': 0.03}, {'is_multiindex': True, 'multiindex_names': "['asset_manager', 'time']", 'asset_manager': 'asset_manager_3', 'time': 0, 'portfolio_value': 133333.33, 'risk_free_rate': 0.03}, {'is_multiindex': True, 'multiindex_names': "['asset_manager', 'time']", 'asset_manager': 'asset_manager_3', 'time': 1, 'portfolio_value': 125000.0, 'risk_free_rate': 0.03}, {'is_multiindex': True, 'multiindex_names': "['asset_manager', 'time']", 'asset_manager': 'asset_manager_4', 'time': 0, 'portfolio_value': 125000.0, 'risk_free_rate': 0.03}, {'is_multiindex': True, 'multiindex_names': "['asset_manager', 'time']", 'asset_manager': 'asset_manager_4', 'time': 1, 'portfolio_value': 120000.0, 'risk_free_rate': 0.02}, {'is_multiindex': True, 'multiindex_names': "['asset_manager', 'time']", 'asset_manager': 'asset_manager_5', 'time': 0, 'portfolio_value': 120000.0, 'risk_free_rate': 0.02}, {'is_multiindex': True, 'multiindex_names': "['asset_manager', 'time']", 'asset_manager': 'asset_manager_5', 'time': 1, 'portfolio_value': 116666.67, 'risk_free_rate': 0.02}])

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Parameters

• standard

Name	Type	Description	Default	Optional
data	List[Data]	Input dataset.		False
y_column	str	Target column.		False
x_columns	List[str]	List of columns to use as exogenous variables.		False

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Returns

OBBject
    results : Dict
        OBBject with the fit model returned