 In one dimension, once the underlying L\'evy process has been specified, the GLM is characterised by four parameters: the initial asset price, the interest rate, the volatility, and a risk aversionfactor .
<clarity>  In one dimension, once the underlying L\'evy process has been specified, the GLM is characterised by four parameters: the initial asset price, the interest rate, the volatility, and a risk aversionfactor .
 In one dimension, once the underlying L\'evy process has been specified, the GLM has four parameters: the initial asset price, the interest rate, the volatility, and a risk aversionfactor .