On the Channels of Pro-Social Behavior Evidence from a natural field experiment

We conduct a natural field experiment on direct and indirect transfer mechanisms for small donations. Charitable contributions are significantly higher if made indirectly, i.e. if they are tied to the purchase of a good sold at a premium, than if they are made directly. Donations are signficantly higher under both transfer mechanisms if people are given a suggested reference donatioTied versus untied transfers, charitable donations, charity, willingness to give, pro social behavior

Inefficient but Effective? A field experiment on the effectiveness of direct and indirect transfer mechanisms

We conduct a field experiment on direct and indirect transfer mechanisms. It shows that people are willing to donate significantly more if the donation is indirect, i.e., it is tied to the purchase of a good with a price premium, rather than made directly. This points to an efficiency–effectiveness trade–off: even though indirect donations are less efficient than direct donations, they are more effective in mobilizing resources. Our findings hold for ‘Fair Trade’ coffee as well as for ‘normal’ coffee. However, the strength of the efficiency–effectiveness trade–off is higher in the case of ‘Fair Trade’.Tied transfers, donations, charity, efficiency versus effectiveness, ‘fair trade’

On the Channels of Pro-Social Behavior-Evidence from a natural field experiment

We conduct a natural field experiment on direct and indirect transfer mechanisms for small donations. Charitable contributions are significantly higher if made indirectly, i.e. if they are tied to the purchase of a good sold at a premium, than if they are made directly. Donations are significantly higher under both transfer mechanisms if people are given a suggested reference donation.Tied versus untied transfers, charitable donations, charity, willingness to give, pro social behavior

Inefficient but effective? A field experiment on the effectiveness of direct and indirect transfer mechanisms

We conduct a field experiment on direct and indirect transfer mechanisms. It shows that people are willing to donate significantly more if the donation is indirect, i.e., it is tied to the purchase of a good with a price premium, rather than made directly. This points to an efficiency–effectiveness trade–off: even though indirect donations are less efficient than direct donations, they are more effective in mobilizing resources. Our findings hold for ‘Fair Trade’ coffee as well as for ‘normal’ coffee. However, the strength of the efficiency–effectiveness trade–off is higher in the case of ‘Fair Trade’.Tied transfers, donations, charity, efficiency versus effectiveness, ‘fair trade’

Fast Hole Tunneling Times in Germanium Hut Wires Probed by Single-Shot Reflectometry

Heavy holes confined in quantum dots are predicted to be promising candidates for the realization of spin qubits with long coherence times. Here we focus on such heavy-hole states confined in Germanium hut wires. By tuning the growth density of the latter we can realize a T-like structure between two neighboring wires. Such a structure allows the realization of a charge sensor, which is electrostatically and tunnel coupled to a quantum dot, with charge-transfer signals as high as 0.3e. By integrating the T-like structure into a radio-frequency reflectometry setup, single-shot measurements allowing the extraction of hole tunneling times are performed. The extracted tunneling times of less than 10$\mu$s are attributed to the small effective mass of Ge heavy-hole states and pave the way towards projective spin readout measurements

Inefficient but effective? A field experiment on the effectiveness of direct and indirect transfer mechanism

We conduct a field experiment on direct and indirect transfer mechanisms. It shows that people are willing to donate significantly more if the donation is indirect, i.e., it is tied to the purchase of a good with a price premium, rather than made directly. This points to an efficiencyeffectiveness tradeoff even though indirect donations are less efficient than direct donations, they are more effective in mobilizing resources. Our findings hold for Fair Trade coffee as well as for normal coffee. However, the strength of the efficiencyeffectiveness tradeoff is higher in the case of Fair Trade

The Cosmological Constant in the Quantum Multiverse

Recently, a new framework for describing the multiverse has been proposed which is based on the principles of quantum mechanics. The framework allows for well-defined predictions, both regarding global properties of the universe and outcomes of particular experiments, according to a single probability formula. This provides complete unification of the eternally inflating multiverse and many worlds in quantum mechanics. In this paper we elucidate how cosmological parameters can be calculated in this framework, and study the probability distribution for the value of the cosmological constant. We consider both positive and negative values, and find that the observed value is consistent with the calculated distribution at an order of magnitude level. In particular, in contrast to the case of earlier measure proposals, our framework prefers a positive cosmological constant over a negative one. These results depend only moderately on how we model galaxy formation and life evolution therein.Comment: 18 pages, 4 figures; matches the version published in Phys. Rev.