This paper develops a wavelet (spectral) approach to test the presence of a unit root in a stochastic process. The wavelet approach is appealing, since it is based directly on the different behavior of the spectra of a unit root process and that of a short memory stationary process. By...

This paper describes the theoretical structure and estimation results for a DSGE model for the Macedonian economy. Having as benchmark the model of Copaciu et al. (2015), modified to allow for a fixed exchange rate, we are able to match relatively well the volatility observed in the data. Given...

Yes, they can! Machine learning models that exploit big data identify leverage determinants and predict leverage better than classical methods. By allowing for nonlinearities and complex interactions, machine learning boosts the out-of-sample R-squared from 36% to 56% over linear methods such as...

Output fluctuations in nontraded sectors are a primary country-specific risk factor because nontraded outputs are consumed domestically. While nontraded sector growth risks are mostly non-diversifiable, they can be partially mitigated by international trades in other sectors. The mitigation...

We present a formal theorem of the square root of the Brownian motion. In doing so, we show that this process can be presented as a typical complex random variable. In addition, we introduce the basic properties of this process

We prove that the assertion of Genest (2020) is incorrect and irrelevant. First, there is no claim (in the paper he is referring to) regarding the dependence of the non-arbitrary constant. That paper did not make any claim that would justify the emergence of Genest (2020). Furthermore, these are...

Machine learning (ML) algorithms utilize the power of computers to solve tasks that are beyond the grasp of classical statistical methods. However, ML is often perceived as a black-box, hindering its adoption. This seminar demonstrates the use of Shapley values to interpret the outputs of ML...

I analyze the interaction between buyers' information acquisition and market liquidity in over-the-counter markets with adverse selection. If a buyer anticipates that future buyers will acquire information about asset quality, she has an incentive to acquire information to avoid buying a lemon...

Product market competition prevents an entrepreneur from extracting the full social surplus from consumers once investment is sunk. Indeed, a project with positive net surplus may generate negative net cash flow. Hence, traditional intermediaries following an NPV rule fail to fund all socially...

The False Strategy theorem tells us that the optimal outcome of an unknown number of historical simulations is right-unbounded — with enough trials, there is no Sharpe ratio sufficiently enough to reject the hypothesis that a strategy is false. Given the ease with which one can use a computer...