Tata Power stood at the forefront of India’s energy transition. The firm’s long history was deeply intertwined with the country's development. As Mumbai’s power needs increased, Tata Power built out thermal assets across India, and while thermal power generation remained Tata Power’s mainstay, the firm slowly started diversifying. In 2020, Tata Power boldly announced a commitment to net-zero emissions by 2050, concurrent with a complete phase-down of thermal capacity. It later brought this commitment forward to 2045. To prepare for declining revenues from thermal power generation, Tata Power was actively expanding its renewable business, but stakeholders had concerns about the company’s ambitions. Was the firm’s decision to sacrifice potentially high returns in thermal power generation financially imprudent, or did it position the firm well as India inevitably accelerated its energy transition? In this episode, host Brian Kenny welcomes Harvard Business School Professor Vikram Gandhi and Tata Power CEO Praveer Sinha to discuss the case Tata Power and India’s Energy Transition, and how India’s largest private power producer is reimagining its future.

In April 2024, writer, podcaster, and entrepreneur Tim Ferriss—known for his hugely popular podcast “The Tim Ferriss Show” and NYT-bestselling books like The 4-Hour Workweek—found himself at a crossroads. Although his podcast was generating millions annually, he questioned the sustainability of podcasting and his own competitive advantage given the increasingly saturated market and the advent of AI tools and video-centric formats. He faced a difficult choice: innovate from within his proven format, pivot to entirely new ventures—possibly in film, premium consumer products, or venture capital—or risk a slow decline by maintaining the status quo. Complicating matters further was Ferriss’s desire to start a family, a goal he prioritized above all business ventures. Every month of indecision narrowed his window for successfully transitioning. Senior Lecturer Reza Satchu and Tim Ferriss joined Cold Call host Brian Kenny to discuss the case, “Tim Ferriss: What Might This Look Like If It Were Easy?”

For 35 years, Dollar Tree, a discount retail chain selling general merchandise, had held its fixed price point steady, charging $1.00 for its ever-changing assortment of household items, food, stationery, books, seasonal items, gifts, toys, and clothing. That changed in late 2021, when the company announced that Dollar Tree was raising prices on all goods to $1.25. Harvard Business School Senior Lecturer Jill Avery joins host Brian Kenny to discuss whether the retail chain could remain relevant to its price sensitive shoppers through smart marketing, pricing, and branding strategies in the case, “Dollar Tree: Breaking the Buck.”

In the winter of 2023, Lyft was facing declining market share and financial pressures. Enter new CEO David Risher, who took the helm amid low morale and limited resources. His challenge: reignite innovation, refocus the culture, and find new ways to stand out in an industry dominated by Uber. Harvard Business School professor Ranjay Gulati joins host Brian Kenny to discuss the case “Lyft 2023: Roads to Growth and Differentiation.” They explore how Risher led during a strategic crossroads, making bold decisions, putting the customer front and center, and shaking loose old habits. Gulati also shares insights from his new book, “How to Be Bold,” illustrating how courage becomes a competitive advantage in times of uncertainty.

How do you scale innovation in a system where critical pieces are out of your control? That is the challenge Highland Electric Fleets faced as it worked to replace diesel school buses with electric vehicles across the United States. While Highland provided financing, infrastructure, and fleet operations, success depended on external partners, including manufacturers, utilities, and districts. Delays and disruptions forced the company to stay nimble and deliver under pressure. Harvard Business School professor Rosabeth Moss Kanter and Highland Electric founder and CEO Duncan McIntyre join host Brian Kenny to discuss the HBS case “’The Wheels on the Bus’ Go Electric.” They explore what it takes to scale a climate solution while sustaining momentum and coordinating across public and private sectors.

Atlassian promised employees they could work from anywhere, permanently. By 2024, its data-driven routines and workplace experiments were shaping both its culture and its products, turning the company into an innovation lab. Now it faces a new challenge: helping customers adopt these practices, which requires hands-on support, strategic advising, and cultural change. Harvard Business School Associate Professor Ashley Whillans joins host Brian Kenny to discuss the case “Designing the Future of Work: Atlassian’s Distributed Work Practices” and the questions Atlassian’s leaders must answer as they try to scale what works.

When Happi Co. CEO Sam Rockwell partnered with Snoop Dogg and his son, Cordell Broadus, to launch Dr. Bombay Ice Cream, the team set out to disrupt a stagnant market with bold flavors and culturally resonant branding. With national retail placement and projected first-year sales of $20 million, the brand quickly made its mark. Now, as Rockwell plans the next phase—marketing, fundraising, and expanding into new markets—he must also navigate the dynamics of a creator-led brand, balancing roles and staying nimble and authentic. Sam Rockwell and Harvard Business School professor Bill Kerr join host Brian Kenny to discuss Kerr’s case, “Dr. Bombay Ice Cream,” which explores the launch and growth of a lifestyle brand built on cultural storytelling and entrepreneurial ambition.

Shake Shack began in 2001 as a single hot dog cart in New York City and grew into a global fast-casual chain known for quality ingredients and a strong hospitality ethos. In 2024, following a rapid digital transformation that introduced kiosks, mobile ordering, and app-based personalization, Chief Growth Officer Stephanie So wondered whether the model they had built was truly ready to scale—or still needed refinement. With a new CEO focused on ambitious growth, the company faced key questions about how technology might support or undermine the Shake Shack experience for both guests and employees. HBS Professor Christopher Stanton joins So and host Brian Kenny to discuss the case “Shake Shack’s Playbook for the Digital Era,” and what it takes to grow a hospitality-driven brand in an increasingly automated industry.

During a busy travel season, digital travel platform Booking.com tried a risky experiment that meant changing the site’s landing page. Then CEO Gillian Tans made the decision to lean into the company’s “test everything” culture—even if it meant failure. In this episode from 2019, HBS Professor Stefan Thomke and host Brian Kenny discuss the case Booking.com. They explore how past experience and intuition can be misleading when attempting to launch something novel. Instead, innovative firms embrace a culture where testing, experimentation, and even failure are at the heart of what they do.

Ming Min Hui, executive director of Boston Ballet, is unique in her field. As a young, Asian American woman with a HBS MBA and a background in finance, she focuses on ensuring the ballet company stays true to its art form and still relevant to its times. Hui had worked for eight years at Boston Ballet as chief of staff and chief financial officer before taking the helm. Now leading one of the foremost ballet companies in the U.S., she confronted evolving demographics, shifting audience habits, and an increasingly challenging financial environment. Harvard Business School Assistant Professor Edward Chang and Hui join host Brian Kenny to discuss the case Ming Min Hui at Boston Ballet. They explore how she balances the past, present, and future—and how these lessons translate from this nonprofit arts organization to any company, anywhere.

Bill Wilson was an incredibly entrepreneurial young man with tremendous potential. He was also a drunk, until an epiphany made him sober. With his personal drive and fellowship with former drinking buddies, Wilson built a social movement and worldwide organization. Founded in 1935, Alcoholics Anonymous has helped millions of “friends of Bill” recover from alcohol addiction. In this episode of Cold Call, HBS Professor Robert Simons joins host Brian Kenny to discuss the case, “Bill Wilson: Changing the World.” They explore how Wilson navigated life’s choices, transformed his life and those of others, and left a lasting impact on the world.

Keurig Green Mountain (KGM) invented a category and became a household name in at-home coffee brewing in North America. But by the early 2010s, the public company suffered a series of product missteps, negative media scrutiny, and challenging partner relationships. In late 2015, the company was acquired by JAB Holding Company. The new CEO Bob Gamgort first strengthened partnerships, raised productivity, and reduced costs. In 2017, the company then focused on new growth. Gamgort considered four major options: take the company public again through an IPO; set out for greater global expansion; combine with another coffee business to become a larger player in North American coffee; or diversify beyond coffee through a “pure play beverage” strategy. In this conversation, HBS Senior Lecturer David Fubini and Research Associate Patrick Sanguineti discuss the four strategic options from their case study, “Keurig: A Return to Growth.”

The 2023 movie Barbie and its accompanying marketing blitz reinstated a celebrated icon at the forefront of cultural conversation. This sudden goodwill stood in contrast to decades of criticism of the Barbie brand. Although proponents had celebrated Barbie for her promise to “inspire the limitless potential in every girl,” detractors felt that the doll promoted a narrow beauty standard and perpetuated gender stereotypes. In this episode of Cold Call, HBS Professor Elie Ofek and coauthor Ryann Noe join host Brian Kenny to discuss the case “Barbie: Reviving a Cultural Icon at Mattel.” They explore how Mattel planned to sustain the Barbie brand’s positive momentum and replicate its success across other toy brands.

Launched in 2011, Duolingo grew into the most downloaded education app in the world. Its gamified approach to language learning and use of adaptive AI technology helped it reach 100 million monthly active users and a market capitalization approaching $15 billion by late 2024. The company also saw the potential of Gen AI to power innovative products beyond languages. CTO Severin Hacker envisioned a future in which AI would transform the app into an educational ecosystem, tapping into the $56 billion edtech market. HBS Senior Lecturer Jeffrey Rayport and coauthor Nicole Keller join host Brian Kenny to discuss the case “Duolingo: On a Streak” and the long-term benefits and risks of this diversification strategy.

In 1952, Palenstinian refugee Elia Nuqul started a trading business in Jordan. Nuqul Group subsequently grew into one of the country’s largest family businesses. Its flagship company, Fine Hygienic Holding (FHH), was a leader in hygienic paper products across the Middle East and North Africa. After Nuqul’s death in 2022, his son Ghassan and three siblings decided to split the Group’s assets so that each branch of the family could forge its own path. They were in discussions to finalize the details of the agreement. In this episode, FHH chairman Ghassan Nuqul and HBS Senior Lecturer Christina Wing join host Brian Kenny to discuss enduring family businesses, a founder’s  legacy, and how business decisions affect family ties in the case “Ghassan Nuqul and the Nuqul Group: Preserving a Father's Legacy.”

In 2021, Donna Lee and Duncan van Bergen founded Calyx Global to improve the quality of carbon credits sold in the voluntary carbon market. Organizations buy those credits for their decarbonization efforts to meet net-zero commitments. The startup had carefully avoided perceptions of conflicts of interest. But it was a challenging time for the industry. Lee and van Bergen had to decide whether tapping new revenue streams would jeopardize their trustworthy reputation. In this episode, HBS Professor Mike Toffel and Duncan van Bergen discuss the company’s business model, its approach to ratings, and the emerging competitive landscape in the case, “Calyx Global: Rating Carbon Credits.”

How important is it to maintain a happy workforce? With this question in mind, Lanco Medical Group, a small but fast-growing pharmaceutical distributor serving Latin America, designed their employee benefits and incentives program. But there were gaps between what leadership believed motivated employees and what employees truly valued. So, the organization collected data about those drivers. Priorities varied by age group, organizational role, and geographic locations. In this episode, HBS Professor Susanna Gallani discusses the case “Lanco Medical Group: Fostering Happiness for Growth” and the tensions between accommodating employees' preferences, maintaining fairness, and operating a manageable incentive program amid aggressive international growth targets.

Porsche has reigned as a leading sports and luxury car company for nearly 80 years. Central to the German automaker’s growth strategy is creating great products, such as the legendary 911 Carrera sports car. But the automotive industry is facing disruption and new competition. Company leadership is adapting Porsche’s product portfolio, recently adding the electric model Taycan. They’re also innovating new customer experiences like the “Track Your Dream” program. In this episode, Harvard Business School Professor Stefan Thomke explores the company’s bid to stay relevant and true to its legacy in the case “Porsche.”

Google formally announced the innovative video game service Stadia at the 2019 Game Developer Conference. The company invested substantial resources to support the demanding requirements of cloud gaming. But the early uptake by premium video gamers was disappointing. The leadership team faced a decision. Should they double down by refocusing Stadia on the casual gamer segment? Or should they pull the plug? In this episode, Harvard Business School Senior Lecturer Derek van Bever and coauthor Akshat Agrawal explore Google’s strategic choice in the case “Google Stadia: Game On or Game Over?”

Cold Call is celebrating its tenth year of distilling Harvard Business School case studies. To kick off the 2025 anniversary, the podcast’s production team has curated three favorite episodes from 2024. Host Brian Kenny recommends one on leadership with HBS Senior Lecturer Tony Mayo. Show producer Robin Passias selects an innovation episode with HBS Professor Frances Frei and entrepreneur Paul English. And audio engineer Craig McDonald highlights one on business model generation with HBS faculty member Jeffrey Rayport and football club cofounder Kara Nortman.