In the present paper we explicitly introduce interest payments and debt into a Kaleckian distribution and growth model with an investment function very close to Kalecki’s original writings. The effects of interest rate variations on the short-run equilibrium values of capacity utilisation, capital accumulation and the rate of profit are derived, and the long run effects on the equilibrium debt-...

We formulate a stylized structural model of health, wealth accumulation and retirement decisions building on the human capital framework of health provided by Grossman. We explicitly assume a functional form of the utility function and carefully account for initial conditions, which allow us to derive analytic solutions for the time paths of consumption, health, health investment, savings and r...

The evolution of the probability density of a biological population is described using nonlinear stochastic differential equations for the growth process and the related Fokker-Planck equations for the time-dependent probability densities. It is shown that the effect of the initial conditions disappears rapidly from the evolution of the mean of the process. But the behaviour of the variance dep...

We study driven-dissipative Bose-Einstein condensates in a two-mode Josephson system, such as a double-well potential, with asymmetrical pumping. We investigate nonlinear effects on the condensate populations and mode transitions. The generalized Gross-Pitaevskii equations are modified in order to treat pumping of only a single mode. We characterize the steady-state solutions in such a system a...

Central to the aims of the contemporary environmental movement, and the research programs it has inspired, is the hope of having a positive causal impact on environmental quality and on the patterns of social behavior that affect it for good or ill. Such causal aspirations lie at the heart of all environmental institutions, whether these take the form of agencies, laws, or advocacy groups. It i...

The recalibrational theory of human anger predicts positive correlations between aggressive formidability and anger levels in males, and between physical attractiveness and anger levels in females. We tested these predictions by using a three-dimensional body scanner to collect anthropometric data about male aggressive formidability (measures of upper body muscularity and leg–body ratio) and fe...

Indeterminacy in an economic growth model arises whenever the stable manifold has dimension greater than the number of predetermined initial conditions. The stability (indeterminacy) of transition paths in the Benhabib and Farmer (1996) model of growth is investigated, using both the Lyapunov method and numerical simulation techniques. The sensitivity of transient dynamics is analyzed with resp...

Recent observations have reported that some gas-rich dwarf irregular (dIrr) galaxies appear to have spherical distributions in the outer underlying old and intermediate-age stellar populations (e.g., NGC 6822). These observations imply that some dIrr’s have two distinct (or “two-component”) structures, i.e., inner disky and outer spherical ones, though the number fraction of dIrr’s with such st...

Using ab initio multiconfigurational potential energy surfaces pertinent to the reaction Zn(P) + H2 ---> ZnH( Σ) + H and local surface tessellation and interpolation methods developed earlier, we carried out classical trajectory simulations of the title reactions, running large ensembles of trajectories with initial conditions representative of full-collision experiments. Then, using binning te...

Complex systems have typically more than one attractor, either periodic or chaotic, and their basin structure ultimately determines the final-state predictability. When certain symmetries exist in the phase space, their basins of attraction may be riddled, which means that they are so densely intertwined that it may be virtually impossible to determine the final state, given a finite uncertaint...