Case studies

The case has the following learning objectives:

1. understand the various types of comparisons that are possible between groups over time and across space;

2. evaluate a policy intervention using relevant data and different methods; and

3. understand the meaning of the phrase “controlling for other relevant factors” in regression and non-regression contexts.

The difference-in-differences (DID) approach is a useful tool for making meaningful comparisons. This case tries to provide a non-technical introduction to the approach using a basic comparison of crime rates among districts in Punjab (Pakistan's largest province). Being the most populous region of the country, Punjab faces many governance challenges, and street crime is one of them. (Exhibit 5 provides additional information about the geographical and administrative setting used in this case study.) In 2016, Chief Minister Shahbaz Sharif established the Dolphin (police) Force in different locations to improve urban patrolling and reduce street crime. There were debates about the effectiveness of the Dolphin Force (DF).

Those who are skeptical of DF point to various situations that were handled incorrectly by DF personnel, as well as other administrative and operational problems in the initiative. Optimists believe it is beneficial and want it to be expanded to other districts and regions. The threat of street crime claims many lives and, according to optimists, necessitates the formation of a special force. Whether the huge resources invested in the DF worth their lot or not can be known through sound statistical analysis that can identify the difference in the rate of crime because of the DF. In this instance, the case provides information to answer the following question:

Is there a significant difference in crime rates between areas where the DF is operating and districts where it has not yet been installed?

In quantitative/statistical analysis classes, the case can be used to teach the DID technique to MBA/MS Applied Statistics/Applied Data Analysis students. It can also be used in undergraduate Econometrics classes.

Teaching notes are available for educators only.

CSS 7: Management Science.

The learning outcomes are as follows: How to establish credibility of data sources; measurement scales of data; the importance of descriptive statistics and generating the following based on the type of data: mean, median and standard deviation; graphical methods; and test for differences: t-test and analysis of variance.

The case is set during the COVID-19 pandemic and the South African Government’s response to the pandemic. A brief timeline is provided as part of the introduction to the case study, with the following being a timeline of the events: 14 March 2020, 114 South African citizens were repatriated from Wuhan the epicentre of the COVID-19 outbreak; 15 March 2020, South Africa’s President, Cyril Ramaphosa declares a National State of Disaster, and this includes various measures to protect against the spread of COVID-19, while the health-care system is geared up to deal with the pandemic. Among the measures implemented, travel bans from high-risk countries and closing of air-traffic, closing of land ports and banning of gatherings of more than 100 people; 23 March 2020, President Cyril Ramaphosa announced a national lockdown beginning on 27 March 2020 for three weeks; 9 April 2020, President Ramaphosa extends the national lockdown by a further two weeks. The World Health Organisation (WHO) had commended South Africa on the swift action taken to curb the spread of the virus. Individuals and organisational leaders are grappling to make sense of the spread of the virus, and the barrage of the information that is being communicated through multiple channels, formal and informal. To make sense of the information, the case is premised on getting access to the raw data and conducting the analysis based on the publicly available data. The central requirement of the case is to compare the number of positive cases per million, based on the population data contained in the data set, of South Africa to a comparable country.

Post-graduate students learning statistics as part of a degree programme. The case assumes no prior statistics knowledge and therefore is aimed at teaching the importance of the basics of statistical analysis and then progressing to tests for differences.

CSS 7: Management Science

Teaching Notes are available for educators only.

The learning outcome is to understand the difference between correlation and causation.

The case is set during the period of the COVID-19 pandemic, globally a search for effective treatments were underway. An initial forerunner that was being considered was Bacille Calmette-Guerin (BCG), given its effectiveness in the treatment of tuberculosis and other pulmonary-related infections. While there were a lack of randomised controlled trials, initial data from publicly related secondary data sources indicated that, in countries with BCG inoculation policies, the severity of the spread and mortality of COVID-19 was muted. The case is centered around the available information on BCG and COVID-19.

Post-graduate students learning statistics as part of a degree programme. The case assumes no prior statistics knowledge and therefore is aimed at teaching the difference between correlation and causation.

CSS 7: Management Science

Teaching Notes are available for educators only.

The case describes the fall of Eskom, which in 2001 was named the Financial Times’ Power Company of the Year, but by 2019 was suffering from “systemic corruption, malfeasance, fraud and state capture” that had “compromised the credibility of the organisation and eroded investor confidence”. Eskom’s incompetent management lays the ground for reasonable doubt as to whether the force majeure notice was indeed irresistible. The case suggests several methods available in financial markets to hedge risk – but to what extent are these relevant and appropriate? The main objective of the case, however, is to examine and assess the criteria required to claim force majeure. Two aspects are questionable: Was the virus unforeseeable and was it irresistible? Eskom is “bleeding” R².5m per month because of significantly reduced electricity demand, and while it clearly benefits Eskom to break their supply contract, the consequences for Exxaro are far more dire. And, if carried to conclusion, how would such actions impact the entire economy?

In April 2020 South Africa’s stated-owned electricity utility Eskom sent a pre-cautionary force-majeure notification to Exxaro Limited’s Grootegeluk Coal Mine. The notification, citing COVID-19 as an unforeseeable, external and irresistible event, would have disastrous consequences for the mine’s 25 m tonnes pa coal contract to supply Eskom’s Medupi power station. Not only was the legality of the force-majeure questionable, it was unethical, and not in the spirit of President Ramaposa’s call to businesses to continue paying contractors. The case briefly describes Eskom’s troubled history following South Africa’s 1994 democratic election. It examines the force majeure clause common in contracts, and questions whether COVID-19 meets the criteria of an “unforeseeable, external and irresistible” event.

MBA and Executive Education

Teaching Notes are available for educators only.

CSS 7: Management Science.

Dave Williams has taken over as CEO for MBC Corporation and wants to change the mission statement of the company. However, he needs to get approval from four shareholders: a former board chairman, his father and current board chairman, and two members of his own executive team. Williams must navigate the varying dynamics and opinions of the shareholders to gain their buy-in and create a new mission statement that will take MBC on a new path for the future.

The concept this case addresses is that of the mission statement and how it is used to align an organization and its stakeholders. After students have analyzed this case, they will be able to:

• Communicate the importance of a mission statement

• Engage stakeholders in the creation of a mission statement

• Implement a new mission and culture at an organization

Communicate the importance of a mission statement

Engage stakeholders in the creation of a mission statement

Implement a new mission and culture at an organization

The Global Health Initiative (GHI) is a tripartite collaboration among Northwestern University, non-profit donors, and commercial diagnostics companies. GHI attempts to bridge the gap between the market for sophisticated medical diagnostics equipment in wealthy nations and the need for point-of-care diagnostics in resource limited settings. In 2006 GHI narrowed its focus to HIV diagnostics for underserved nations. The case examines the accuracy-access tradeoff related to the roll-out of infant HIV diagnostics in Tanzania. Tanzania has a prevalent HIV/AIDS problem, particularly in children. As of 2007, Tanzania had an estimated 140,000 children infected with HIV. Existing lab-based diagnostic equipment was either inaccurate for use in infants or required highly skilled health workers. Tanzania's limited infrastructure also forced healthcare providers to choose between providing advanced care to a minority of the population and offering minimal care to the majority with poor access. A Kellogg MBA student research team performed more than thirty in-country interviews to collect data on stakeholder perceptions of three infant test concepts: the strip test, the squeeze test, and the filter paper test. Across the three tests, access decreased as accuracy increased---rural labs could not find or afford health workers skilled enough to conduct the test. In general, interviewees closely affiliated with the government preferred accuracy over access. In contrast, private health facilities had to follow fewer regulations and preferred access over accuracy. The case focuses on the decisions facing Kara Palamountain, the executive director of GHI, in her roll-out recommendations for infant HIV tests in Tanzania. It examines key factors of working in a developing country, including the need to operate in the absence of sufficient market research, balance the competing agendas of different stakeholders, and mitigate external risks such as major international funding dry

This case was written to be used as a teaching case for students unfamiliar with how to approach and analyze a typical business school case. Unlike many cases used in specific classroom settings, this case is intended to be broad enough that any single student will not have a significant advantage because of his or her background. Moreover, the case is designed to guide students' thinking in a certain direction, using open-ended and more focused discussion questions provided at the case's end.

A midwest hospital purchases new CT Scanners which are much faster than the existing technology. Processes in the radiology department are optimized to the older, existing scanners and technicians are unable to take full advantage of the new scanner speed. The hospital finds itself working to change the processes to suit the new scanners capabilities and take full advantage of their speed.

This case allows students to analyze process capacity and time performance in different settings and understand how process structure impacts both operational and financial performance.

Carolina Lunker Sauce is a new product attempting to break into the fishing attractants category. The company founders are evaluating cutting the retail price of the product in order to secure distribution. Analyzing this decision forces the leaders of this struggling company to evaluate their overall new product strategy and the product’s positioning in the market.

To focus on new product strategy, positioning, and pricing.

A major barrier for growth of large multi-business unit firms is the inability to resource the critical initiatives to win—both in terms of dollars and people. The underpinning of the challenge involves the conflict between resourcing current cash-generating legacy businesses vs. new initiatives which may not, in the short term, produce positive financial results. Most companies do not have a formal portfolio process to deal with this fundamental issue. Danaka is a fictional company based on real business experiences. The company has strong growth markets as well as markets that are commoditizing. Unfortunately, the latter represent a sizable portion of the company's business. A framework is given that establishes a matrix to analyze the Danaka businesses using their critical financial criteria—cash generation and top-line growth. Projects are divided into four categories based on how they fit into the matrix, and resource allocations are then analyzed. Students discover that the current allocation does not enable Danaka to meet its aggressive growth goals. The case incorporates an interactive spreadsheet model in which students can dynamically change the various resource allocations and see the impact on future top-line growth. The essence of the case is how to manage the resource allocation for a multi-business unit firm when present allocations will not meet future growth goals.

The key learning of this case is that when business leaders set financial goals, they must understand how they are expending their resources. More often than not, significant changes must occur that could be wrenching to the organization. The key learning objectives are: (1) realize the importance of performing a portfolio analysis; (2) discuss the issues involved in making the changes; and (3) understand how to put the decision process in place.

The case focuses on the career of Gil Mandelzis, a former Wall Street investment banker who recognized and seized an opportunity to build his company, Traiana, into a successful services provider for financial institutions in the foreign exchange prime brokerage market. The case describes Mandelzis's history, beginning with his earliest entrepreneurial effort as a Tel Aviv bar owner and continuing through his decision to start Traiana. Time and again, Traiana achieved success only to be undone by unexpected, uncontrollable events. Each time, Mandelzis rebuilt the company from scratch. In one memorable instance--the one that enabled Traiana's ultimate success--Mandelzis abandoned a business plan that had created a $10 million company, fired 40 percent of his employees, and embarked on a brand-new direction. At the time the case is set, Traiana appears poised to grow into a major force in the foreign exchange prime brokerage business. Then Mandelzis receives an offer to buy the company for $164 million. The management team must either accept the offer or assume the risk that Traiana's growth will continue and its value will escalate in the coming years. For a company that has repeatedly seen unexpected events derail management's plans, taking the risk is not easy. The case posits three choices: accept the offer, reject the offer, or seek out other buyers.

Students must determine Traiana's value and advise Mandelzis how to respond to the offer. In determining its value, students learn to consider factors outside the company. The key insight in analyzing this case is understanding that Traiana's value should be seen in terms of its worth to the potential buyer rather than only using typical valuation measures such as current or projected revenues.