View source: R/header_replication.R

run_casestudy | R Documentation |

Run the case study in KLTG (2021), or a smaller version thereof

```
run_casestudy(
data_df,
burnin_size = 5000,
max_mcmc_sample_size = 5000,
nr_of_chains = 3,
first_vint = "1996Q2",
last_vint = "2014Q3",
forecast_horizon = 1,
random_seed = 816
)
```

`data_df` |
data frame in the same format as the gdp data set in this package. |

`burnin_size` |
length of the burn-in period used for each forecast. |

`max_mcmc_sample_size` |
maximal number of MCMC draws to consider (integer, must equal either 1000, 5000, 10000, 20000 or 40000). Defaults to 5000. |

`nr_of_chains` |
number of parallel MCMC for each forecast date (integer, defaults to 3). |

`first_vint, last_vint` |
first and last data vintage (= time point at which forecasts are made). Default to "19962Q2" and "2014Q3", respectively. |

`forecast_horizon` |
forecast horizon to be analyzed (integer, defaults to 1). |

`random_seed` |
seed for random numbers used during the MCMC sampling process. Defaults to 816. |

The full results in Section 5 of KLTG (2021) are based on the following setup: `burnin_size = 10000`

,
`max_mcmc_sample_size = 50000`

, `nr_of_chains = 16`

, `data_df = gdp`

, `first_vint = "1996Q2"`

,
`last_vint = "2014Q3"`

, and `forecast_horizon = 1`

. Since running this full configuration is very
time consuming, the default setup offers the possibility to run a small-scale study which reproduces the
qualitative outcomes of the analysis. Running the small-scale study implied by the defaults of `run_study`

as well as the GDP data (`data_df = gdp`

) takes about 40 minutes on an Intel i7 processor.

Object of class "casestudy", containing the results of the analysis. This object can be passed to `plot`

for plotting, see the documentation for plot.casestudy.

Fabian Krueger

Krueger, F., Lerch, S., Thorarinsdottir, T.L. and T. Gneiting (2021): ‘Predictive inference based on Markov chain Monte Carlo output’, *International Statistical Review* 89, 274-301. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1111/insr.12405")}

plot.casestudy produces a summary plot of the results generated by run_casestudy run_casestudy uses ar_ms to fit a Bayesian Markov Switching model, recursively for several time periods.

```
## Not run:
data(gdp)
cs <- run_casestudy(data_df = gdp, last_vint = "1999Q4")
plot(cs)
## End(Not run)
```

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