About

JR Keller is an Associate Professor of Human Resource Studies at the ILR School at Cornell University. His research focuses on understanding how firms make hiring decisions and how individuals make career choices, with particular interest in how these dynamics influence employee job changes within firms. His work has been published in leading academic and practitioner outlets, including Administrative Science Quarterly, Academy of Management Journal, Harvard Business Review, and Industrial & Labor Relations Review. Keller holds a Ph.D. in Management from the Wharton School of Business, a Masters in Adult Education from Indiana University, and undergraduate degrees in Finance and Computer Applications from the University of Notre Dame. Prior to his academic career, he worked as a financial analyst and a career consultant.

Research topics

• Business
• Marketing
• Political Science
• Psychology
• Process management
• Economics
• Management
• Public relations

Selected publications

• Atacama Cosmology Telescope: High-resolution component-separated maps across one third of the sky

  Physical review. D/Physical review. D. · 2024 · 55 citations

  • Physics
  • Astrophysics
  • Astronomy

  Observations of the millimeter sky contain valuable information on a number of signals, including the blackbody cosmic microwave background (CMB), Galactic emissions, and the Compton-$y$ distortion due to the thermal Sunyaev-Zel'dovich (tSZ) effect. Extracting new insight into cosmological and astrophysical questions often requires combining multiwavelength observations to spectrally isolate one component. In this work, we present a new arc-minute-resolution Compton-$y$ map, which traces out the line-of-sight-integrated electron pressure, as well as maps of the CMB in intensity and E-mode polarization, across a third of the sky (around $13,000\text{ }\text{ }{\mathrm{deg}}^{2}$). We produce these through a joint analysis of data from the Atacama Cosmology Telescope (ACT) data release 4 and 6 at frequencies of roughly 93, 148, and 225 GHz, together with data from the Planck satellite at frequencies between 30 and 545 GHz. We present detailed verification of an internal linear combination pipeline implemented in a needlet frame that allows us to efficiently suppress Galactic contamination and account for spatial variations in the ACT instrument noise. These maps provide a significant advance, in noise levels and resolution, over the existing Planck component-separated maps and will enable a host of science goals including studies of cluster and galaxy astrophysics, inferences of the cosmic velocity field, primordial non-Gaussianity searches, and gravitational lensing reconstruction of the CMB.

  PublisherOA PDFDOI

• The food and beverage cues in digital marketing model: special considerations of social media, gaming, and livestreaming environments for food marketing and eating behavior research

  Frontiers in Nutrition · 2024 · 44 citations

  • Computer Science
  • Marketing
  • Business

  Digital marketing to children, teens, and adults contributes to substantial exposure to cues and persuasive messages that drive the overconsumption of energy dense foods and sugary beverages. Previous food marketing research has focused on traditional media, but less is known about how marketing techniques translate within digital platforms, such as social media, livestreaming, and gaming. Building upon previous theories and models, we propose a new model entitled food and beverage cues in digital marketing (FBCDM). The FBCDM model specifies key marking elements and marketing integration strategies that are common on digital platforms and are hypothesized to enhance the effects of advertising and incentive sensitization process. FBCDM also categorizes measurable outcomes into three domains that include brand, food, and social outcomes. Additionally, repeated marketing exposure and the resulting outcomes are hypothesized to have long term consequences related to consumer markets, consumption behavior, culture, and health. We include a discussion of what is currently known about digital marketing exposure within the outcome domains, and we highlight gaps in research including the long-term consequences of digital marketing exposure. The FBCDM model provides a conceptual framework to guide future research to examine the digital marketing of food and beverages to children and adolescents in order to inform government and industry policies that restrict the aggressive marketing of products associated with obesity and adverse diet related outcomes.

  PublisherOA PDFDOI

• The Hydrophobin Gene Family Confers a Fitness Trade-off between Spore Dispersal and Host Colonization in Penicillium expansum

  mBio · 2022 · 29 citations

  • Biology
  • Microbiology
  • Genetics

  .

  PublisherDOI

• Volcano-pluton connections at the Lake City magmatic center (Colorado, USA)

  Geosphere · 2022 · 21 citations

  • Geology
  • Geochemistry
  • Seismology

  Abstract Exposed at the Lake City caldera (Colorado, USA) is the ca. 23 Ma reversely stratified (rhyolite to trachyte) Sunshine Peak Tuff and post-collapse syenite and monzonite resurgent intrusions. Existing models for this system suggest that the rhyolites are related to the trachyte and resurgent syenite through fractional crystallization, separation, and remobilization (crystal mush model), and that multiple magma batches were involved in the system (Hon, 1987; Kennedy et al., 2016; Lubbers et al., 2020). We use U-Pb zircon CA-ID-TIMS-TEA and zircon trace-element modeling to further probe age and geochemical relationships between the extrusive and intrusive units. Zircon ages and compositions from the erupted units and the syenite overlap, suggesting these magmas were related and may have mixed prior to eruption. Results from the monzonite suggest it was a contemporaneous but distinct magma batch that mixed with parts of the larger system. Trends in zircon geochemistry are decoupled from time, reflecting a complex history of accessory mineral saturation and mixing of magma batches, and a distinct high-Hf population of zircon grains hints at the existence of an additional, independent batch of rhyolitic magma in the system. The new ages we present shorten the lifetime of the Lake City magmatic system from 80 to 300 k.y. (Bove et al., 2001) to 60 to 220 k.y. and suggest the high-silica rhyolite magma crystallized over a minimum of ~160 k.y. This latter timescale likely reflects a protracted history that includes differentiation of a parent melt prior to extraction of eruptible high-silica rhyolite magma.

  PublisherOA PDFDOI

• Nanobiotechnology-based strategies for enhanced crop stress resilience

  Nature Food · 2022 · 244 citations

  • Nanotechnology
  • Biology
  • Agronomy

  Nanobiotechnology approaches to engineering crops with enhanced stress tolerance may be a safe and sustainable strategy to increase crop yield. Under stress conditions, cellular redox homeostasis is disturbed, resulting in the over-accumulation of reactive oxygen species (ROS) that damage biomolecules (lipids, proteins and DNA) and inhibit crop growth and yield. Delivering ROS-scavenging nanomaterials to plants has been shown to alleviate abiotic stress. Here we review the current state of knowledge of using ROS-scavenging nanomaterials to enhance plant stress tolerance. When present below a threshold level, ROS can mediate redox signalling and defence pathways that foster plant acclimatization against stress. We find that ROS-triggering nanomaterials, such as nanoparticulate silver and copper oxide, have the potential to be judiciously applied to crop species to stimulate the defence system, prime stress responses and subsequently increase the stress resistance of crops.

  DOI

• Current Issues in Sport Science

  Current Issues in Sport Science (CISS) · 2022 · 57 citations

  • Sociology
  • Social Science
  • Engineering ethics

  CISS welcomes and encourages articles addressing a broad range of topics across sport science which include but is not limited to genetic, biological, physical, physiological, psychological, pedagogical, sociological, environmental, policy among other aspects. In this editorial, we highlight several topics of interest for each of our sections within CISS: biology & medicine, biomechanics & informatics, movement & exercise science, pedagogy & history, psychology & philosophy, public health, sociology & economics and technology. We hope to motivate you and your colleagues to join us in advancing the field of sport science.

  DOI

• My Manager Moved! Manager Mobility and Subordinates’ Career Outcomes

  Organization Science · 2021 · 12 citations

  Senior authorCorresponding
  • Political Science
  • Business
  • Public relations

  How do managers’ moves across jobs affect the subordinates they leave behind? Manager mobility disrupts established manager-subordinate relationships, as subordinates must now learn to work with a replacement. We explore how this relational disruption affects subordinates’ objective career success—specifically, their financial rewards and subsequent promotion chances. We argue that manager mobility may have both positive and negative implications for subordinate outcomes. The loss of an established relationship may reduce subordinates’ performance and managers’ propensity to reward them; on the other hand, relational disruption may make subordinates more willing and able to seek out valuable opportunities elsewhere in the organization. We also argue that these effects are likely to be greatest for those subordinates who had worked with the previous manager for longer. Using eight years of personnel data from the U.S. offices of a Fortune 500 healthcare company, we show how managers’ mobility is associated with a decrease in subordinates’ financial rewards but an increase in their promotion prospects.

  PublisherDOI

• Quantifying the Dynamics of Polystyrene Microplastics UV-Aging Process

  Environmental Science & Technology Letters · 2021 · 125 citations

  • Environmental chemistry
  • Chemistry
  • Environmental science

  Massive amounts of plastic waste have been released into ecosystems, generating huge amounts of microplastics (MPs) and nanoplastics (NPs) during the environmental aging process. However, particle size and number dynamics along the aging process have not been quantitatively assessed, which can greatly influence their fate and environmental risk assessment. We applied single particle inductively coupled plasma mass spectroscopy (spICP-MS) to quantitatively analyze the polystyrene (PS) MPs aging process with a wide particle size range (800 nm–5 μm) as well as particle number concentration at an environmentally relevant value (down to 7.1 × 106 particles/L). We investigated the UV-light accelerated aging dynamics of PS MPs and revealed the generation of large amounts of nano/microsize PS MPs fragments. PS MPs showed a rapid size downtrend along the aging process, shrinking from 5 to 1 μm. At the same time, PS MPs particle number concentration increased 3 times. Furthermore, pristine PS MPs may induce acute toxicity in feeding behavior, growth, and survival, while aged ones caused marked chronic toxicity on the reproduction inhibition of Daphnia magna, both at environmentally relevant concentrations. Overall, the research uncovered and quantified MPs particle size and concentration during the aging process, which is essential to assessing ecotoxicological risks of MPs/NPs.

  DOI

• Magnesium Oxide Nanomaterial, an Alternative for Commercial Copper Bactericides: Field-Scale Tomato Bacterial Spot Disease Management and Total and Bioavailable Metal Accumulation in Soil

  Environmental Science & Technology · 2021 · 41 citations

  • Environmental chemistry
  • Environmental science
  • Environmental engineering

  = 0.05). This study demonstrates that MgO nanomaterial could be an alternative for Cu bactericide and have potential in reducing risks associated with development of tolerant strains and for reducing Cu load in the environment.

  DOI

• Relationship between cognitive flexibility and subsequent course of mood symptoms and suicidal ideation in young adults with childhood-onset bipolar disorder

  European Child & Adolescent Psychiatry · 2021 · 33 citations

  • Psychology
  • Clinical psychology
  • Psychiatry
  PublisherOA PDFDOI

Frequent coauthors

• Peter Cappelli

  11 shared

• Matthew Bidwell

  University of Pennsylvania

  9 shared

• Paul Sparrow

  Lancaster University

  7 shared

• Rebecca R. Kehoe

  Cornell University

  4 shared

• Erin E. Makarius

  University of Akron

  4 shared

• Rhett Andrew Brymer

  4 shared

• Dorothea Roumpi

  Pennsylvania State University

  3 shared

• Minseo Baek

  3 shared

Awards & honors

• 2019 Scholarly Impact Award, Academy of Management HR Divisi…
• 2026 Best Conference Paper - Strategic Human Capital Interes…
• 2026 MacIntyre Award for Exemplary Teaching, ILR School, Cor…
• 2026 Merrill Presidential Scholar Most Influential Professor…
• 2026 Best Conference PhD Paper, SMS Annual Conference

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