# Summarizing dbchoice estimation

### Description

Summary method for objects of class `"dbchoice"`

.

### Usage

1 2 3 4 5 |

### Arguments

`object` |
an object of class |

`x` |
an object of class |

`digits` |
a number of digits to display. |

`...` |
optional arguments. Currently not in use. |

### Details

The function `summary.dbchoice()`

computes and returns a list of summary
statistics of the fitted model in `object`

of the `"dbchoice"`

class.

Some of the values are printed up to certain decimal places. Actual values of
individual components are displayed separately, for instance, by `summary(object)$coefficients`

.
See the **Value** section for a list of components.

### Value

In addition to those available in the `object`

of the `"dbchoice"`

class,
the following list components are added.

`medianWTP` |
the estimated median WTP. |

`meanWTP` |
the estimated mean WTP. |

`trunc.meanWTP` |
the estimated mean WTP truncated at the maximum bid. |

`adj.trunc.meanWTP` |
the truncated mean WTP with the adjustment of
Boyle |

`LR.test` |
a vector containing the likelihood ratio test statistic, the degrees of freedom and the associated p-value. The null is that all the parameters on the explanatory variables other than constant and the bid variable are jointly zero. |

`coef` |
a table of estimates including their s.e., z-value, and p-value. |

`AIC` |
information criterion (AIC and BIC). |

### References

Boyle KJ, Welsh MP, Bishop RC (1988).
“Validation of Empirical Measures of Welfare Change: Comment.”
*Land Economics*, **64**(1), 94–98.

### See Also

`dbchoice`