Category Archives: Uncategorized

Buy vs Rent: Homes

Since so many people lost their homes, their down payments, and all of their home equity in the 2007 mortgage derivatives crisis, many of them have been reluctant to venture back into home ownership.  Real estate prices in many cities have recovered, but buyers have not.  Homeownership rates in the US peaked shortly before the crisis and began a long steady decline from which they have never recovered.

Homeownership Rates

Even as home prices plummeted during the Great Recession of 2007/2008, rents kept climbing.

Although homeownership used to be the cornerstone of the American dream, these changes in housing economics have called into question the conventional wisdom. Now, many people are asking, “Should I buy, or should I rent?

Typical analyses draw attention to the difference is who pays what expenses, such as maintenance, taxes, utilities, mortgage principal, and interest.  What these analyses fail to realize is that these expenses, normally associated with home ownership, must be built into rent as well.  That is landlords expect to be able to pay all of the expenses they are responsible for from the proceeds of the rent they collect.  Aside form the convenience of being able to remodel, redecorate (for home owners) or not having to worry about surprise repair expenses (for renters), the principal financial difference in the decision to rent or buy depends on three things (in declining order):

  1. Changes in the market value of the home,
  2. The creditworthiness of the buyer/renter, as expressed in terms of the interest rate at which they can borrow funds (i.e, obtain a mortgage), and
  3. The frequency of transaction costs, such as real estate commissions.

By far, the most important of these, the most uncertain of these, and the most difficult of these to get good guidance or advice on, is the change in the market value of the home.

To establish the current market value of any particular home, professional appraisers typically look for comparable homes that have sold recently.  Using a database of home sales available from the Multiple Listing Service (MLS), appraisers will establish the value of an uncertain property by comparing it to those of similar size, condition, and locations, making adjustments for inevitable dissimilarities.  Because only licensed professionals have access to the MLS data, buyers, renters, landlords or home owners doing their own research must rely on alternative sites such as or, which glean sales data from public records and provide updated estimates or home value.  Because these estimates are not informed by an inspection of the property in its current condition, they are often understood to be less reliable than a professional appraisal or a real estate market analysis.  Nonetheless, they are widely available.

Home owners take all of the risk of declining home prices, and all of the gain of increasing.  Moreover, except in the case of adjustable rate mortgages (ARMs), homeowners enjoy certainty in fixed mortgage principal and interest payments.  Only their taxes and maintenance expenses can go up.  By contrast, renters may be subject to price increases when market conditions result in low vacancy rates.

Thus, the decision to Buy vs Rent will depend on the net present value of the expected future cash flow forecasts.  Home owners should forecast constant payments for several years, with only modest increases for taxes or home owners association fees, while renters might use the data in Figure 2 above to forecast slowly increasing rents.  At purchase, a homeowner may incur large one-time transactions fees and pay a down payment, whereas a renter will only be required to post a security deposit (and sometimes the first and last month of rent). At the end of the ownership or rental period, the homeowner will sell the property and have the proceeds of the sales, less any transaction fees (such as a real estate commission, typically 5%-7% of the sale price) and the payment of the remaining mortgage principal.  Thus, the homeowner might recover cash from the sale, or have to pay additional cash if their sale price is insufficient to fund payment of the remaining mortgage principal.  By contrast, the rent typically expects only return of their security deposit, with no market risk from the sale and fewer transactions costs.

The best way to answer the Buy vs Rent question is to draw the expected cash flow diagrams for each alternative, compute the net present value, and then conduct a sensitivity analysis that explores different eventual sale prices.  The alternative with the least net present cost (or value) will be the preferred option… but, the answer is likely to depend entirely on the final sales prices.  Those buyers optimistic about market appreciation will have a preference for buying, while pessimistic buyers will prefer to rent.



What problem are you trying to solve?

Simon Sinek advises us to Start With Why? when communicating our ideas.

In his hypothetical marketing message from Apple (back when Steve Jobs was CEO) he asks us to imagine what it might sound like if Apple started with What? they do instead of Why? they do it. And it (of course) falls flat.

The Why? of engineering entrepreneurship typically starts with a problem to solve. We can compare Sinek’s hypothetical Apple marketing to the real launch of the original iphone, by Jobs himself.

In this video, Jobs explicitly explains the Why? when he says, “The problem is… “.

Whenever we define a problem, we simultaneously call to mind the solution. Understanding the problem that you’re trying then becomes the most important thing about your solution.

For example, the peer-to-peer ride hailing app Uber as famously founded to solve the problem that passengers have waiting for taxis.  A very similar app called Gett was conceived in the same way, but launched to solve the problem that taxi drivers have finding passengers.  Although the apps provide almost the same solution, they solve different problems.  (By contrast, Lyft was founded to solve the problem of empty seats in cars driven home from college campuses during breaks).

Most engineers only receive training in problem solving, to the neglect of problem formulation. As a consequence, engineers are too often the mere instruments hired to create innovative technologies that conform the world to someone else’s imagination.

There are four questions essential to engineering innovation:

  • WHAT problem are you trying to solve?
  • WHY is this problem important?
  • WHO has the problem? and
  • HOW MUCH are the people with the problem willing to pay for a solution?


Technical Report: Part 1-Corporate Statement of Qualifications

Each team will complete a Corporate Statement of Qualifications that includes the following two subsections:

A. Company Profile.
In this section, you will begin working on creating your company identity. Specifically, you need to:
a. Choose a name for your group
b. Create a group identity (including any logos, acronyms and written descriptions of services your company specializes in)
c. Create a vision, a mission, and a statement of your company values. Use examples from engineering and technology companies like Bechtel , Netflix , Amazon , or others you admire.
B. Personnel.
The goal of this second subsection is for your team to describe the qualifications of the individuals that make up your company. Use the information gathered from your LinkedIn and DISC assignments to describe the strengths of your team. List projects – either work, class, or hobby – that group members have completed.
You may find examples of Corporate Statements of Qualifications online here and here
(or elsewhere online).
Your assignment will be graded on the following criteria:
1. Professional presentation of the overall document
2. Well-developed corporate professional Identity
3. Well-developed individual team members’ professional identity