## pricing.pareto_extrapolation()


Expected loss of layer `to` per unit of expected loss of layer


Usage


``` python
pricing.pareto_extrapolation(
    from_,
    to,
    alpha,
    truncation=None,
)
```


`from_`, under a Pareto with this alpha (and truncation).


## Parameters


`from_: tuple of float`  
`(limit, attachment)`.

`to: tuple of float`  
`(limit, attachment)`.

`alpha: float`  

`truncation: float = None`  


## Returns


`float`  


## Examples

``` python
>>> from prospicio.pricing import pareto_extrapolation
>>> round(pareto_extrapolation((1e6, 1e6), (2e6, 2e6), 2.0), 12)
```

0.5