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Purpose – The purpose of this paper is to determine the impact of political risk on the German solar energy industry … EGARCH model assessing potential changes in conditional volatility response of solar industry stock returns following … political risk events. Findings – The results document major changes in political support of the solar industry drive capital …
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This paper discusses model-based inference in an autoregressive model for fractional processes which allows the process to be fractional of order d or d-b. Fractional differencing involves infinitely many past values and because we are interested in nonstationary processes we model the data...
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In this article we derive conditions which ensure the non-negativity of the conditional variance in the Hyperbolic GARCH(p; d; q) (HYGARCH) model of Davidson (2004). The conditions are necessary and sufficient for p < 2 and sufficient for p > 2 and emerge as natural extensions of the inequality constraints derived in...</2>
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