Subclasses of meromorphically multivalent functions defined by a differential operator

In this paper we introduce and study two new subclasses \Sigma_{\lambda\mu mp}(\alpha,\beta)$and$\Sigma^{+}_{\lambda\mu mp}(\alpha,\beta)$of meromorphically multivalent functions which are defined by means of a new differential operator. Some results connected to subordination properties, coefficient estimates, convolution properties, integral representation, distortion theorems are obtained. We also extend the familiar concept of$% (n,\delta)-$neighborhoods of analytic functions to these subclasses of meromorphically multivalent functions

Decomposing the Determinants of Interest Rates in Turkey and Selected: Emerging Markets Implementing Inflation Targeting Policies

Inflation Targeting (IT) is a monetary policy in which keeping inflation as close as to the target level using policy tools is the main focus for many central banks. However, purely targeting inflation has the potential to reveal the drawback of the trade-off between inflation and output, leaving out the possibility of perfectly anticipated inflation where there is no trade-off. IT policy is relatively more difficult for emerging market economies compared to developed countries due to the potential fragilities emerging from the large amount of fluctuations in the portfolio investments. High current account deficits, fiscal dominance, lack of credibility, imperfections in many goods markets, volatility in commodity prices are some of the factors that contribute to the fragilities in the economic stabilities and render the economy more open to external shocks. Overall, lack of institutionalism in emerging economies may hamper central bank independence, which is essential for a fully-functioning IT regime. Under such conditions, giving priority to IT is a difficult path to follow together with the impacts of the developments in other economic variables at different horizons. Hence, decomposing the weights of the economic fundamentals in determining the monetary policy will provide information about devotion to IT as the policy rule. Considering the domestic environment and the externalities, this paper aims (i) to investigate the monetary policy rule of the Central Bank of the Republic of Turkey under a structural VAR (vector auto-regression) model, (ii) to structurally decompose the variation of the determinants of the monetary policy, and (iii) examine the determinants and the decompositions for a set of inflation targeting emerging market economies. The IT (explicit or implicit) emerging economies to make comparison are as follows: Brazil, Chile, Mexico, Czech Republic, Hungary, Poland, Indonesia, South Korea, South Africa, and Israel. SVAR methodology is used for time series analysis for Turkey whereas GMM based panel VAR is employed for the panel of 11 emerging countries. Empirical findings suggest importance of institutional variables in monetary policy rules especially in the long run and that adopting IT and rise in credibility contributes to central banks of emerging economies by lowering interest rates

Asymmetry in Inflation Targeting

Following the world financial crisis beginning in the last quarter of 2008, aggregate demand and commodity prices have declined sharply leading to a fast decline in world inflation. This different and new period reflects the rise in risk appetite leading to high fluctuations in the short term capital flows. World central banks revised their monetary policy to the changing conditions taking into account financial stability. In 2002, Turkish central bank adopted inflation targeting (in the implicit form) to maintain price stability. After 2008, following the developments in global markets, Turkish economy reflects similar characteristics in the form of decline in inflation rates. Together with the changes in the economic conditions, estimating monetary policy models in the form of constant-coefficient and symmetric specification may lead to erroneous interpretations. This study analyze the existence of structural break(s) and asymmetric behavior for the 2003-2016 period. The paper also examines the monetary policy model under New Keynesian fashion. Turkish monetary policy investigated for the period presents October 2009 as the break point under different models and structural break tests. Asymmetric reactions to interest rate, output and exchange rate are observed suggesting the different monetary preferences of the central bank of Turke

Some properties of certain subclasses of analytic functions with negative coefficients by using generalized Ruscheweyh derivative operator

summary:By making use of the known concept of neighborhoods of analytic functions we prove several inclusions associated with the $(j,\delta )$-neighborhoods of various subclasses of starlike and convex functions of complex order $b$ which are defined by the generalized Ruscheweyh derivative operator. Further, partial sums and integral means inequalities for these function classes are studied. Relevant connections with some other recent investigations are also pointed out

An extension of the univalence criterion for a family of integral operators

The main object of the present paper is to extend the univalence condition for a family of integral operators. Relevant connections of some of the results obtained in this paper with those in earlier works are also provided