## risk.hill()


Hill estimates of the tail index [xi](risk.Gpd.md#prospicio.risk.Gpd.xi) (`1 / alpha`) from the `k`


Usage


``` python
risk.hill(
    draws,
    ks,
)
```


largest draws, for each `k`.


## Parameters


`draws: list of float`  

`ks: list of int`  


## Returns


`list of float`  


## Raises


`ValueError`  
If a `k` is 0 or not below the number of draws, or the `k + 1` largest draws are not all positive.