This paper presents new benefit–cost estimates for the Tulsa universal pre-K program. These calculations are based on estimated effects, from two recent papers, of Tulsa pre-K on high-school graduation rates and college attendance rates of students who were in kindergarten in the fall of 2006. In the current paper, educational effects from these prior papers are used to infer lifetime earnings effects. Our conservative estimates suggest that per pre-K participant, the present value of earnings effects in 2021 dollars is $25,533, compared with program costs of $9,628, for a benefit–cost ratio of 2.65. Compared to prior benefit–cost studies of Tulsa pre-K, this benefit–cost ratio is below what was predicted from Tulsa pre-K’s effects on kindergarten test scores, but above what was predicted from Tulsa pre-K’s effects on grade retention by ninth grade. This fading and recovery of predicted pre-K effects as children go through K-12 and then enter adulthood is consistent with prior research. It suggests that pre-K may have important effects on “soft skills,” such as persisting in school, and reminds us that short-term studies of pre-K provide useful information for public policy.

The effects of plasma heating and thermal non-equilibrium on the statistical properties of a low-Reynolds-number ($Re_{\tau } = 49$) turbulent channel flow were experimentally quantified using particle image velocimetry, two-line planar laser-induced fluorescence, coherent anti-Stokes Raman spectroscopy and emission spectroscopy. Tests were conducted at two radiofrequency plasma settings. The nitrogen, in air, was vibrationally excited to $T_{vib} \sim 1240\ \mathrm{K}$ and 1550 K for 150 W and 300 W plasma settings, respectively, while the vibrational temperature of the oxygen and the rotational/translational temperatures of all species remained near room temperature. The peak axial turbulence intensities in the shear layers were reduced by 15 and 30 % in moving across the plasma for the 150 and 300 W cases, respectively. The plasma did not alter the transverse intensities. The Reynolds shear stresses were reduced by 30 and 50 % for the 150 and 300 W cases. The corresponding Reynolds shear stress correlation coefficient was also reduced, which indicates that the large-scale structures were diminished. Finally, the plasma enhanced the turbulence decay in the zero-shear regions, where the power law decay $t^{-1/n}$ exponential factor $n$ decreased from 1.0 to 0.8.

Michael Gillespie speaks of the “theological origins of modernity,” in order to describe both the profoundly religious character of the modern West, and tensions within the Enlightenment and within the progressive philosophies of history that it generated and that are instantiated in the works of Kant, Hegel, Marx, Kojève, and the like.

Michael Oakeshott, one of the most important political thinkers in the second half of the twentieth century, has been understood to be a skeptical conservative, a romantic, a liberal individualist, an historian of political thought, a philosopher, a charismatic teacher. Each of these characterizations conveys something to be found in his life and work. This essay offers an intellectual portrait of his life's work from early to late through consideration of his major works from Experience and its Modes (1933) to Rationalism in Politics (1962; 1991), to the culmination in On Human Conduct (1975). His understanding of political philosophy is examined. The usefulness of the aforementioned characterizations is assessed.

Leo Strauss, Max Weber, and the Scientific Study of Politics.

Interest in Michael Oakeshott's political philosophy has been growing for a generation, since the publication of the original edition of his Rationalism in Politics (1962), a collection of essays dating from 1947 to 1960. Few then were aware of Experience and Its Modes (1933), a book that has since become the subject of much attention as the desire to understand Oakeshott's work as a whole has grown. With the publication of On Human Conduct (1975), Oakeshott gave us the work he hoped would confirm his place in the tradition of British political thought going back to Hobbes. Of course, his notable essays on Hobbes are now available in Hobbes on Civil Association (2000).