boot2 {DBfit} | R Documentation |

## First Boostrap Procedure For parameter estimations

### Description

Function performing the second bootstrap procedure to yield the inference of the regression coefficients

### Usage

```
boot2(y, xcopy, phi1, beta, nbs, method, scores)
```

### Arguments

`y` |
the response variable |

`xcopy` |
the original design matrix (including intercept), without centering |

`phi1` |
the estimate of the autoregressive parameter rho from the first bootstrap procedure |

`beta` |
the estimates of the regression coefficients from the first bootstrap procedure |

`nbs` |
the bootstrap size |

`method` |
If "OLS", uses the ordinary least square; If "RANK", uses rank-based fit |

`scores` |
Default is Wilcoxon scores |

### Value

`betacov` |
the estimate of var-cov matrix of betas |

`allbeta` |
the estimates of betas inside of the second bootstrap, not the final estimates of betas. The final estimates of betas are still from |

`rhostar` |
the estimates of rho inside of the second bootstrap, not the final estimates of rho. The final estimate(s) of rho are still from |

`MSEstar` |
MSE used inside of the second bootstrap. |

### Note

This function is for internal use. The main function for users is `dbfit`

*DBfit*version 2.0 Index]