> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fincept.in/llms.txt
> Use this file to discover all available pages before exploring further.

# Panel data and datasets

> Classic econometrics example datasets (wage panel, job training, Mroz, Card, fertility, birth weight, Fama-French portfolios, Munnell public capital, fringe benefits, MEPS) and simulated panels; panel structure, balance and within/between variation, demeaning, first differences and group means; HAC kernel weights and the automatic bandwidth.

Toolset `panel_data`: 3 tools.

| Tool | What it does | Notes |
| - | - | - |
| `panel_dataset` | Returns a classic econometrics dataset bundled with the engine (or a simulated panel) as columns by name, with its description: variables, units and source. | |
| `panel_structure` | Describes a long panel or applies the panel transforms the estimators use. | |
| `panel_hac_bandwidth` | The automatic (data-driven) bandwidth for a HAC covariance with the chosen kernel, and the kernel weight on each lag at that bandwidth (or at the bandwidth given), as a series with a bar chart. | |

Inputs, limits and outputs are described in [Fincept Panel](/guides/fincept-panel). Full schemas: `fincept_describe_tool`.


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