Farm Tenancy Distribution and Trends in the United States

This paper includes a study of the mutual fund market investors during a selected time period. The reader is given a descriptive picture of how people in different age groups have  acted  in  conjunction  with  the  last  major  financial  crisis.  It  has  been  studied whether people in the different age categories have saved, purchased or sold during this time  period  based  on  theories  and  analytic  material  from  one  of  the  largest  fund operators in Sweden. The result enlightens people’s activity and risk appetite in relation to the fund market. The essay results in an explanation of the underlying cause of the behavior        of         the         people         in         the         different         age         categories. The paper assumes that the market is cyclical and that more crises will occur in the future. The most recent crisis developed during the years 2007-2008 and has therefore been  selected  to  represent  the  analyzed  period.  Among  other  things,  a  general hypothesis  was  applicable  to  recurring  tendency  of  nonprofessional  retail  client  in extreme market situations to buy fund shares at a high value and sell them at low value in the market. The starting point was to criticize this hypothesis, which clearly turned out   to   be   in   favor   for   one   of   the   mutual   funds   that   have   been   observed. The result shows that more people in the middle age save more than those in their young years as well as those in the retirement age. The conclusion of the study shows that when this crisis occurred there were no major withdrawals from any of the mutual funds. In fact the sales transaction was reduced in the period of time from the peak of the stock market in 2007 to the time market touched the ground in 2008.I denna uppsats undersöks fondmarknadens investerare under en vald tidsperiod. Läsaren ges en beskrivande bild av hur personer i olika ålderskategorier har agerat i samband med den senaste stora finanskrisen. Det har studerats, med stöd av teorier och analysmaterial från en av Sveriges största fondaktörer, huruvida personer i de olika ålderskategorierna har sparat under denna period. Resultatet belyser personers aktivitet och riskbenägenhet i förhållande till fondmarknaden. Uppsatsen mynnar ut i en förklaring till vad som är och kan vara bakomliggande orsaker till beteendet hos personerna i de olika ålderskategorierna. Undersökningen utgår från att marknaden är cyklisk och att fler kriser kommer uppkomma i framtiden. Den senaste krisen ägde rum under år 2007-2008 och har därför valts ut för att representera den tidsperiod som avser att analyseras. Bland annat har en generell hypotes testats gällande att icke-professionella kunder har en återkommande tendens att i extrema marknadslägen köpa vid uppgång och sälja vid nedgång i de utvalda tillväxtmarknadsfonderna. Utgångspunkten var i detta hänseende att förkasta denna hypotes, vilket tydligt visade sig stämma i en av de fonder som studerats. Resultatet visar i korthet att fler personer i medelåldern investerar mer än de i ungdomens år och pensionsåldern. Slutsatsen av undersökningen visar på att när detta krisläge uppstod skedde inga större uttag ur någon av fonderna. De facto minskar säljtransaktionerna överlag från toppnoteringen på börsen under år 2007 till bottennoteringen år 2008

Altruism among relatives and non-relatives

The amount of their own monetary reward that undergraduate participants claimed they were willing to forgo, in order to give $75 to another person, decreased hyperbolically as social distance increased between the participant and the other person. Relatives tended to be ranked at closer social distances than were non-relatives. However, even at the same social distance, participants were willing to forgo significantly more money for the benefit of relatives than for the benefit of non-relatives. These results imply that altruism is determined by factors in addition to social distance

Evolutionary Analysis of Gaseous Sub-Neptune-Mass Planets with MESA

Sub-Neptune-sized exoplanets represent one of the most common types of planets in the Milky Way, yet many of their properties are unknown. Here, we present a prescription to adapt the capabilities of the stellar evolution toolkit Modules for Experiments in Stellar Astrophysics (MESA) to model sub-Neptune mass planets with H/He envelopes. With the addition of routines treating the planet core luminosity, heavy element enrichment, atmospheric boundary condition, and mass loss due to hydrodynamic winds, the evolutionary pathways of planets with diverse starting conditions are more accurately constrained. Using these dynamical models, we construct mass-composition relationships of planets from 1 to 400 $M_{\oplus}$ and investigate how mass-loss impacts their composition and evolution history. We demonstrate that planet radii are typically insensitive to the evolution pathway that brought the planet to its instantaneous mass, composition and age, with variations from hysteresis. We find that planet envelope mass loss timescales, $\tau_{\rm env}$, vary non-monotonically with H/He envelope mass fractions (at fixed planet mass). In our simulations of young (100~Myr) low-mass ($M_p\lesssim10~M_\oplus$) planets with rocky cores, $\tau_{\rm env}$ is maximized at $M_{\rm env}/M_p=1\%$ to $3\%$. The resulting convergent mass loss evolution could potentially imprint itself on the close-in planet population as a preferred H/He mass fraction of ${\sim}1\%$. Looking ahead, we anticipate that this numerical code will see widespread applications complementing both 3-D models and observational exoplanet surveys.Comment: 18 pages, 9 figures, and 4 tables. Accepted to the Astrophysical Journal on August 29th, 201

Dust emission from Barnard 35: Gas heating anomaly resolved

The molecular cloud B35 has puzzled observers because it contains gas which is, at T sub g approx. = 23 K, hotter that the surrounding dust whose T sub d approx. = 10 K. An investigation of the IRAS data, however, shows a previously unreported dust component at T sub d approx. 33 K, whose luminosity is ample to heat the gas. IRAS also finds that about 12 percent of the total luminosity around the core, and about 20 percent along the rim, arises from the small grain component with T less than or = 300 K. The temperature of these two components vary across the source, and this behavior is discussed. The results illustrate the presence of multiple components of dust in these clouds, and emphasize the need for data at multiple wavelengths