The paper starts from the point of view of the necessity of taking into account two groups of factors of general growth in the process of revival in the Republic of Croatia. First, these are material factors of development, as assets assigned to investment, capital goods and foreign assistance....

For proper valuation of risk to which the portfolio of financial assets is exposed, it is necessary to forecast the second moments of financial time series, that is variabilities. The empirical investigations show that financia time series are heteroskedastic, i.e. their volatility is not...