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    <subfield code="a">Bitcoin as digital money</subfield>
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    <subfield code="e">its growth and future sustainability</subfield>
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    <subfield code="a">Analisa-se o crescimento e a sustentabilidade futura da moeda virtual &#xAB;bitcoin&#xBB;. O crescimento acentuado do volume de transa&#xE7;&#xF5;es que utilizam esta moeda torna relevante o desenvolvimento da investiga&#xE7;&#xE3;o econ&#xF3;mica. Com recurso &#xE0; metodologia ARCH &amp; GARCH pretende-se conhecer a volatibilidade desta moeda virtual. Os resultados confirmam uma elevada volatibilidade, o que explica a resist&#xEA;ncia dos governos em conceder um estatuto legal &#xE0; utiliza&#xE7;&#xE3;o desta moeda nos v&#xE1;rios pa&#xED;ses. Se a moeda estabilizar no futuro, ser&#xE1; aceite com facilidade e a confian&#xE7;a na sua utiliza&#xE7;&#xE3;o ser&#xE1; uma realidade.</subfield>
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    <subfield code="d">Winter 2017</subfield>
    <subfield code="v">Vol. 24, n&#xBA; 4</subfield>
    <subfield code="t">Theoretical and Applied Economics</subfield>
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