## pricing.alpha_between_frequencies()


The Pareto alpha between two excess frequencies.


Usage


``` python
pricing.alpha_between_frequencies(
    threshold_1, frequency_1, threshold_2, frequency_2, truncation=None
)
```


## Parameters


`threshold_1: float`  

`frequency_1: float`  

`threshold_2: float`  

`frequency_2: float`  

`truncation: float = None`  


## Returns


`float`  


## Examples

``` python
>>> from prospicio.pricing import alpha_between_frequencies
>>> round(alpha_between_frequencies(1e6, 4.0, 2e6, 1.0), 12)
```

2.0