通过预防召回获得边际竞争优势

对消费品公司来说，产品召回是一个严重的问题。在美国，每年因为安全原因有成千上万的产品被召回。如图1所示，在1999年和2001年间，14个主要类别的消费品的召回数量在稳定地增加。保守地估计，每个公司召回的平均成本多于800万美元，包括对消费者的赔偿。对消费品行业来说，这可以转化为多于60亿美元的成本，这个估计不包括市场信誉造成的销售损失和失去的市场份额。     

Further examination of the demographic and social factors affecting risk aversion

In this paper we examine how social and demographic factors explain risk aversion. Specifically, we focus on how an individual’s place of residence effects his level of risk aversion. Israel is a natural experiment field for such an investigation since the majority of its population lives either in big or small cities, moshavs, or kibbutzim, where the last two forms of settlement being unique to Israel. The kibbutz follows the prototype of a collectivist culture; the moshav follows the prototype of an individualistic culture. This environment also allows us to reexamine the contradiction between the “cushion hypothesis” and previous findings regarding the risk aversion of Israeli kibbutz residents. In general, we find that the moshav respondents demonstrate the lowest level of risk aversion and the kibbutz (and the small city) respondents demonstrate the highest. However, further examination reveals that the risk aversions are domain specific. The urban residents of both big and small cites are similar to each other than they are to residents of the kibbutz and the moshav, who, in turn, are more similar to each other than they are to the urban residents. For example, kibbutz and moshav respondents are less risk averse in insurance and gambling, but more risk averse in driving and sport, compared to urban residents. Interestingly, on average, the respondents demonstrate the highest level of risk aversion for extreme sports and the lowest level of risk aversion for irresponsible driving.     

The optimal supply of congested public goods for homogeneous and heterogeneous customers

Impure public goods resulting from the congestion effect are discussed in the literature solely for the case of homogenous populations where consumers have identical demands. We extend this to include heterogeneous populations, where demands are rectangularly distributed. We compare the optimal values of the control variables (quantity of the public good and the number of users) for both homogeneous and heterogeneous populations, as well as the social optimum values for both cases. We distinguish between two kinds of congestion effects: (1) increased usage which negatively affects the individual consumer's utility, and (2) the affect is located on the supply side, i.e. higher production costs due to an increased number of users.     

Abnormal investor response to the index effect for daily and intraday data

Events that directly affect stock indices are of considerable importance to various index instruments such as ETFs and index funds. One of the most important of such events involves updating the index, which takes place once or twice per year. The effect this has on the capital markets is known as the “index effect”, and it is one of the strongest and most influential long-term effects. Using two different methods, I examine how the index effect impacts the Israeli capital markets. I examine the three leading market indices—the Tel-Aviv 25, the Tel-Aviv 75, and the Tel-Tech 15—for firms whose stocks enter and exit their respective index for both daily and intraday data. In the first examination, I divide the sample based on firms entering/exiting each of these three market indices and examine the index effect using daily data. This analysis shows that the market responds differently for firms entering and exiting the Tel-Aviv 25 than it does for the two other indices. For the second examination, the sample is divided based on each stock’s volatility during the period prior to the event using intraday data. This analysis shows that more volatile stocks respond more strongly to the indexing event.     

Reservations on the classical Laffer curve

Throughout the last two decades, some economists have objected to the conventional shape of one peak point on the Laffer curve. This paper examines the reservations presented in the literature and demonstrates the possibility of a Laffer curve with three peak points. Such a shape may be due to the three heterogeneous population groups of younger workers, adult males, and adult females. These groups respond differently to net wage rate changes, thus reducing the applicability of the changing of tax rates by policymakers.

     

The effect of natural gas discoveries in Israel on the strength of its currency

In light of the natural gas discoveries in the Mediterranean Sea and their impact on the Israeli economy, I must assess the change in the exchange rate and its impact on the foreign exchange market. There are numerous positive social impacts resulting from the gas discoveries including optimising Israel's energy security and its move to cleaner energy. However, not all of the consequences of discovering natural resources may be positive. One possibly negative outcome could be the well-known phenomenon called the “Dutch disease” in which the discovery of a natural resource can cause a country's currency to spike. To investigate whether the strengthening of the Israeli currency in recent years is a symptom of the “Dutch disease” I used daily and intraday event study methodology to explore the changes in the real exchange rate of the Israeli shekel and the US dollar between 2008 and 2017, according to announcements related to the gas discoveries published during this period. In addition, I examined whether an increase in the real exchange rate was a result of the publication of announcements about natural gas harming the manufacturing and industrial sectors. I found that announcements related to gas discoveries did affect the real exchange rate and caused an appreciation of the Israeli shekel. Investors could analyse the announcements and achieve an abnormal return in the foreign exchange market. In addition, investors' expectations of an appreciation in the real exchange rate causes damage to various manufacturing and industrial sectors.     

The effect of Airbnb announcements on hotel stock prices

The sharing economy model that was developed in the last decade has a major effect on a different aspect of life. The purpose of this research is to test the effect of a sharing economy product on its competitors. Specifically, this study used the event study approach to examine how Airbnb announcements affected hotel stock prices. To accomplish this goal, we used 180 Airbnb announcements to investigate the general effect of Airbnb, and the effects according to the type of announcement and the type of audience. The findings indicate that general Airbnb announcements have a negative effect on the hotel stock prices. In addition, investors respond negatively to positive announcements but not to neutral ones. Finally, announcements targeting young people have no effect on the stock prices of hotel companies, while the effect of announcements targeting families lasts the longest. We also explored investment strategies for general investors and those with inside information. We suggest that general investors short sell the stock on the day of the news announcement. Investors with inside information should short sell the stock a few days before the day of the news announcement. In both cases, investors should close their positions a few days later depending on the type of announcement.