4.8: Trucos técnicos con elasticidades
- Page ID
- 141131
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El primer término en la forma final de esta expresión
se obtiene de la pendiente de la curva de demanda, y el segundo término (P/Q) se define por el punto en la curva que nos interesa. Por ejemplo si nuestra curva de demanda es
, entonces
. Invertir esto para obtener
rendimientos —1 también. Entonces, el valor de elasticidad puntual at
es
. Esta fórmula proporciona el valor de elasticidad en un punto particular de la curva de demanda, en lugar de en un rango de valores o un arco. En consecuencia se le llama la elasticidad puntual de la demanda. Y obviamente podríamos aplicarlo a una curva de demanda que no sea lineal siempre que conozcamos la forma matemática y seamos capaces de establecer la pendiente.