What Citizens Know Depends on How You Ask Them: Political Knowledge and Political Learning Skills

Surveys provide widely-cited measures of political knowledge. Do unusual aspects of survey interviews reduce their relevance? To address this question, we embedded a set of experiments in a representative survey of over 1200 Americans. A control group answered political knowledge questions in a typical survey context. Respondents in treatment groups received the same questions in different contexts. One group received a monetary incentive for answering questions correctly. Others were given more time to answer the questions. The treatments increase the number of correct answers by 11-24 percent. Our findings imply that conventional knowledge measures confound respondents’ recall of political information and their motivation to engage the survey question. The measures also provide unreliable assessments of respondents’ abilities to access information that they have stored in places other than their immediately available memories. As a result, existing knowledge measures likely underestimate peoples’ capacities for informed decision making.political knowledge; economic knowledge; experimental economics; incentives; survey

What Citizens Know Depends on How You Ask Them: Experiments on Time, Money and Political Knowledge

Surveys provide widely cited measures of political knowledge. Do unusual aspects of survey interviews affect these measures? An experiment on a nationally representative sample of over 1200 Americans provides an answer. Respondents are randomly assigned to one of four groups. A control group answers questions in a typical survey context. Respondents in three treatment groups are given a longer window of time in which to answer questions, a small monetary incentive for answering questions correctly, or both. These variations increase performance significantly for almost every knowledge question we asked. Overall, average knowledge scores in the treatment groups are 11-24 percent higher than in the control group. The treatments also cause significant reductions in the magnitude of respondents’ errors on open-ended questions. The findings imply that new elicitation strategies can improve our understanding of what citizens know about politics and other socially relevant phenomena.information economics, political information, experimental economics, incentives

Public Ignorance and Estate Tax Repeal: The Effect of Partisan Differences and Survey Incentives

We re-examine whether the broad support for repeal of the estate tax is a result of citizen ignorance. We find that increasing information about the estate tax or politics in general has very different effects on Republicans and Democrats. While high and low-information Republicans support estate tax repeal, Democratic support is higher among those who know less. However, most highly-informed people in both parties support repeal. We also show that standard surveys overestimate the extent of misinformation about the estate tax. Therefore, “ignorance” is not a compelling explanation of why so many people support estate tax repeal.estate tax; voter competence; survey research; experimental economics; public policy

What Citizens Know Depends on How You Ask Them: Political Knowledge and Political Learning Skills

Surveys provide widely-cited measures of political knowledge. Do unusual aspects of survey interviews reduce their relevance? To address this question, we embedded a set of experiments in a representative survey of over 1200 Americans. A control group answered political knowledge questions in a typical survey context. Respondents in treatment groups received the same questions in different contexts. One group received a monetary incentive for answering questions correctly. Others were given more time to answer the questions. The treatments increase the number of correct answers by 11-24 percent. Our findings imply that conventional knowledge measures confound respondents’ recall of political information and their motivation to engage the survey question. The measures also provide unreliable assessments of respondents’ abilities to access information that they have stored in places other than their immediately available memories. As a result, existing knowledge measures likely underestimate peoples’ capacities for informed decision making

Dual-polarization VCSEL-based optical frequency comb generation

Poster of: 2015 European Conference on Lasers and Electro-Optics/European Quantum Electronics Conference (CLEO/EUROPE-EQEC 2015)Optical Frequency Comb Generators (OFCG) based on Cost of the Shelf (COTS) laser diodes (LDs) are interesting systems for many applications as they offer compactness and cost efficiency. However, the optical frequency span and the coherence of the modes is still a limiting factor when comparing to combs based on other laser technologies. Among LDs, Vertical-Cavity Surface-Emitting Lasers (VCSELs) under Gain Switching (GS) regime [1] produce record combs in terms of energy efficiency and mode coherence. GS is a well-known nonlinear technique to directly generate OFCGs from LDs

Continuous wave sub-THz photonic generation with VCSEL-based optical frequency comb

A simple and energy-efficient photonic system to generate continuously tunable, low phase noise, sub-THz waves based on COTS components is presented. The optical scheme is based on the use of a commercial vertical cavity surface emitting laser under gain switching modulation that provides a very flat optical frequency comb generator (OFCG) with 23 modes in a 20 dB bandwidth. The laser only needs 15 dBm continuous wave radiofrequency input power and 9 mA of bias current to provide this OFCG. Two optical injection locking stages filter and amplify the two desired modes that are detected in a photodiode to produce the desired sub-THz signal at the frequency difference of these two selected modes. As an example, demonstrated is the generation of a very stable 88.2 GHz tone with lower linewidth than 10 Hz using a reference of 4.2 GHz to generate the OFCG.The work by Á.R. Criado has been supported by the Spanish Ministry of Science and Technology under the FPI Program, grant no. BES2010-030290Publicad

VCSEL-Based Optical Frequency Combs: Toward Efficient Single-Device Comb Generation

Optical frequency combs generators (OFCGs) have demonstrated to be extremely useful tools in a wide variety of applications. The current research trends look toward compact devices that are able to offer high phase correlation between optical lines, and in this sense, mode-locked laser diodes (MLLDs), with repetition frequencies in the few gigahertz (GHz) range, and especially microresonators, with repetition frequencies of hundreds of GHz, are the most promising devices fulfilling these requirements. Nevertheless, focusing in the few GHz frequency rate, MLLDs cannot provide continuous tunability and require special devices that are still far from offering reliability and repeatability for commercial use. In this letter, we demonstrate for the first time the generation of a flat OFCG based on a single commercial vertical cavity surface emitting laser under gain-switching regime with 20 optical lines (spaced by 4.2 GHz) in a 3-dB bandwidth, offering wide tunability range and very high phase correlation between optical modes. This OFCG does not need any external modulator and it is the most energy-efficient OFCG reported to date.Publicad

Public Ignorance and Estate Tax Repeal: The Effect of Partisan Differences and Survey Incentives

We re-examine whether the broad support for repeal of the estate tax is a result of citizen ignorance. We find that increasing information about the estate tax or politics in general has very different effects on Republicans and Democrats. While high and low-information Republicans support estate tax repeal, Democratic support is higher among those who know less. However, most highly-informed people in both parties support repeal. We also show that standard surveys overestimate the extent of misinformation about the estate tax. Therefore, “ignorance” is not a compelling explanation of why so many people support estate tax repeal