National Bureau of Economic Research

A short note on differential equations and on Geometry

A short note on differential equations. We add some lines of interest about Some topics in Geometry.

Clinician Use of an Artificial Intelligence–Enabled Clinical Information Platform

Importance Despite growing interest in the use of artificial intelligence (AI) in medicine, empirical evidence on how clinicians use these tools is limited. Objective To characterize clinician use of an AI-enabled clinical information platform, the distribution of use across the...

Short Communication on Email Management Systems

We present the opportunity to Manage Emails with More in-depth Computing Systems. Many options and examples are of interest.

Differential Take-Up of Supplemental Security Income in Florida for Very Low Birth Weight Infants

OBJECTIVE: Supplemental Security Income (SSI) eligibility is automatically granted for the subset of very low birth weight (VLBW) infants born below 1200 g. We estimated the effects of automatic eligibility on SSI take-up among VLBW infants near the cutoff, both overall and for k...

Percutaneous Coronary Intervention Facility Access and Clinical Outcomes Among Patients With Acute Myocardial Infarction

Importance The proliferation of percutaneous coronary intervention (PCI) facilities across the US has raised questions about whether expanding capacity improves outcomes in areas already served vs those without prior access. Objective To evaluate the association between the openi...

Short Communication on Objects Found on Road

We have found some Objects on Road in Montreal City. Some Remarks are made.

Predicted Incrementality by Experimentation for Ad Measurement

Randomized controlled trials (RCTs) provide the most credible estimates of advertising incrementality but are difficult to scale. We propose Predicted Incrementality by Experimentation (PIE), which reframes ad measurement as a campaign-level prediction problem. PIE uses a sample...

Trends in Spending on Corrective Lenses

Importance About 50% of the population has a refractive error, but corrective lenses can impose cost barriers on patients given the lack of widespread vision insurance. Objective To describe temporal trends and sociodemographic variation in corrective lens spending and payment so...

Registering A Company [Some Countries of Interest]

We are investigating how to register a company. Many options and countries are of interest (some examples are given).

Registering A Company [Some Countries of Interest]

We are investigating how to register a company. Many options and countries are of interest (some examples are given).

Registering A Company [Some Countries of Interest]

We are investigating how to register a company. Many options and countries are of interest (some examples are given).

Registering A Company [Some Countries of Interest]

We are investigating how to register a company. Many options and countries are of interest (some examples are given).

Did Recent Inflation Reflect a Nonlinear Phillips Curve?

We also thank Carola Conces Binder

Does Privacy Matter? Evidence from a Legal Reform

We investigate the impact of a unique legislative reform that granted anonymity to plaintiffs in court rulings for personal injury claims. Prior to the reform’s implementation in August 2015, claimants who rejected settlement offers faced the risk that court proceedings would pub...

Money, Time, and Grant Design

We conduct survey experiments to test how the design of scientific grants—the money and time awarded—can be used to manage researchers. On average, researchers are relatively unwilling to trade off money for time when choosing among grants. However, there is significant heterogen...

Globalization, Capital Taxation, and Development: Evidence from a Macrohistorical Database

This paper builds and analyzes a new global macrohistorical database of effective tax rates on capital and labor in 154 countries. We establish a new stylized fact: While effective capital tax rates fell in developed countries between 1965 and 2018, they rose in developing countr...

Application to Dalhousie University September 2026 : A Quick Note About Information System Classifications

We have started an Application into The Dalhousie University English Program. We notice for the first time a very intelligent information system. Some documents that we did save in our Google Drive Account [but not published elsewhere*] have contributive value in the system. As f...

Letter to University of Montreal – Address to Our Supervisors Team

In this paper, We are addressing a note to University of Montreal, mainly our Supervisors : Professor [bilodeau@dms.umontreal.ca],Professor [duchesne@dms.umontreal.ca], and Professor [murua@dms.umontreal.ca], Professor Perron [perronf@dms.umontreal.ca],Professor David [dhaziza@uo...

Letter to University of Montreal – Address to Our Supervisors Team

In this paper, We are addressing a note to University of Montreal, mainly our Supervisors : Professor [bilodeau@dms.umontreal.ca],Professor [duchesne@dms.umontreal.ca], and Professor [murua@dms.umontreal.ca], Professor Perron [perronf@dms.umontreal.ca],Professor David [dhaziza@uo...

Air pollution after the shutdown of US embassy monitoring

For more than a decade, US embassies and consulates provided independent, publicly accessible air-quality information in cities worldwide. In 2025, this program was abruptly suspended, generating sharp drops in the availability of trusted pollution information. We evaluate the co...