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  "Title": "Estimating a GARCHSK Model and GJRSK Model",
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  "Authors@R": "c(\nperson(\"Kei\",\"Nakagawa\",email=\"kei.nak.0315@gmail.com\",role=c(\"aut\",\"cre\"),comment = c(ORCID = \"0000-0001-5046-8128\"))\n)",
  "Description": "Functions for estimating a GARCHSK model and GJRSK model\nbased on a publication by Leon et,al\n(2005)<doi:10.1016/j.qref.2004.12.020> and Nakagawa and\nUchiyama (2020)<doi:10.3390/math8111990>. These are a\nGARCH-type model allowing for time-varying volatility, skewness\nand kurtosis.",
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  "RoxygenNote": "6.0.1",
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  "Packaged": {
    "Date": "2026-10-09 09:37:19 UTC",
    "User": "root"
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  "Author": "Kei Nakagawa [aut, cre]\n(<https://orcid.org/0000-0001-5046-8128>)",
  "Maintainer": "Kei Nakagawa <kei.nak.0315@gmail.com>",
  "Repository": "https://keeeeei0315.r-universe.dev",
  "Date/Publication": "2021-07-22 06:00:07 UTC",
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  "_created": "2026-10-09T09:37:19.000Z",
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  "_exports": [
    "garchsk_construct",
    "garchsk_est",
    "garchsk_fcst",
    "garchsk_ineqfun",
    "garchsk_lik",
    "gjrsk_construct",
    "gjrsk_est",
    "gjrsk_fcst",
    "gjrsk_ineqfun",
    "gjrsk_lik",
    "kurtosis",
    "skewness"
  ],
  "_datasets": [
    {
      "name": "GBP",
      "title": "GBP/USD exchange rate from 1990-01-03 to 2002-5-3 from Bloomberg.",
      "object": "GBP",
      "class": [
        "numeric"
      ],
      "fields": [],
      "table": false,
      "tojson": true
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  "_help": [
    {
      "page": "GARCHSK",
      "title": "GARCHSK",
      "topics": [
        "GARCHSK-package",
        "GARCHSK"
      ]
    },
    {
      "page": "garchsk_construct",
      "title": "This function constructs GARCHSK model of given data and parameters.",
      "topics": [
        "garchsk_construct"
      ]
    },
    {
      "page": "garchsk_est",
      "title": "This function estimates GARCHSK model's parameters.",
      "topics": [
        "garchsk_est"
      ]
    },
    {
      "page": "garchsk_fcst",
      "title": "This function forcasts conditional mean,variance,skewness and kurtosis with given GARCHSK model.",
      "topics": [
        "garchsk_fcst"
      ]
    },
    {
      "page": "garchsk_ineqfun",
      "title": "This function is inequality equation of GARCHSK parameters used in optimization process(Rsolnp).",
      "topics": [
        "garchsk_ineqfun"
      ]
    },
    {
      "page": "garchsk_lik",
      "title": "This function calculates the log-likelihood of GARCHSK model.",
      "topics": [
        "garchsk_lik"
      ]
    },
    {
      "page": "GBP",
      "title": "GBP/USD exchange rate from 1990-01-03 to 2002-5-3 from Bloomberg.",
      "topics": [
        "GBP"
      ]
    },
    {
      "page": "gjrsk_construct",
      "title": "This function constructs GJRSK model of given data and parameters.",
      "topics": [
        "gjrsk_construct"
      ]
    },
    {
      "page": "gjrsk_est",
      "title": "This function estimates GJRSK model's parameters.",
      "topics": [
        "gjrsk_est"
      ]
    },
    {
      "page": "gjrsk_fcst",
      "title": "This function forcasts conditional mean,variance,skewness and kurtosis with given GJRSK model.",
      "topics": [
        "gjrsk_fcst"
      ]
    },
    {
      "page": "gjrsk_ineqfun",
      "title": "This function is inequality equation of GJRSK parameters used in optimization process(Rsolnp).",
      "topics": [
        "gjrsk_ineqfun"
      ]
    },
    {
      "page": "gjrsk_lik",
      "title": "This function calculates the log-likelihood of GJRSK model.",
      "topics": [
        "gjrsk_lik"
      ]
    },
    {
      "page": "kurtosis",
      "title": "This function calculates kurtosis of given data.",
      "topics": [
        "kurtosis"
      ]
    },
    {
      "page": "skewness",
      "title": "This function calculates skewness of given data.",
      "topics": [
        "skewness"
      ]
    }
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